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 +====== Theory of spectroscopy,​ dynamics and numerical methods for complex materials ======
  
 +
 +===== Publications =====
 +
 +==== 2016 ==== 
 +
 +  * [73] S. Macke, J. E. Hamann-Borrero,​ R. J. Green, B. Keimer, G. A. Sawatzky, and M. W. Haverkort,​\\ //Dynamical Effects in Resonant X-Ray Diffraction//,​\\ [[http://​journals.aps.org/​prl/​abstract/​10.1103/​PhysRevLett.117.115501|Phys. Rev. Lett. 117, 115501 (2016)]], arXiv, {{ :​publications:​phys._rev._lett._2016_macke.pdf | }}.
 +
 +  * [72] Y. Lu, A. Frano, M. Bluschke, M. Hepting, S. Macke, J. Strempfer, P. Wochner, G. Cristiani, G. Logvenov, H. U. Habermeier, M. W. Haverkort, B. Keimer, and E. Benckiser,​\\ //​Quantitative determination of bond order and lattice distortions in nickel oxide heterostructures by resonant x-ray scattering//,​\\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.93.165121|Phys. Rev. B 93, 165121 (2016)]], arXiv, {{ :​publications:​phys._rev._b_2016_lu.pdf | }}.
 +
 +  * [71] C. Praetorius, M. Zinner, P. Hansmann, M. W. Haverkort, and K. Fauth,\\ //Exploring small energy scales with x-ray absorption and dichroism//,​\\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.93.165107|Phys. Rev. B 93, 165107 (2016)]], arXiv, {{ :​publications:​phys._rev._b_2016_praetorius.pdf | }}.
 +
 +
 +  * [70] Maurits W. Haverkort,​\\ //Quanty for core level spectroscopy - excitons, resonances and band excitations in time and frequency domain//,\\ [[http://​iopscience.iop.org/​article/​10.1088/​1742-6596/​712/​1/​012001|Journal of Physics: Conference Series 712, 012001 (2016)]], arXiv, {{ :​publications:​j._phys._conf._ser._2016_haverkort.pdf | }}.
 + 
 +  * [69] M. Hunault, V. Vercamer, Maurits W. Haverkort, Marie-Anne Arrio, C. Brouder, G. Calas, and A. Juhin,\\ //Tracking the signature of low symmetry environments in the XAS Kpre-edge//,​\\ [[http://​iopscience.iop.org/​article/​10.1088/​1742-6596/​712/​1/​012005|Journal of Physics: Conference Series 712, 012001 (2016)]], arXiv, {{ :​publications:​j._phys._conf._ser._2016_hunault.pdf | }}.
 +
 +==== 2015 ==== 
 +
 +  * [68] Martin Sundermann, Fabio Strigari, Thomas Willers, Hannes Winkler, Andrey Prokofiev, James M. Ablett, Jean-Pascal Rue, Detlef Schmitz, Eugen Weschke, Marco Moretti Sala, Ali Al-Zein, Arata Tanaka, Maurits W. Haverkort, Deepa Kasinathan, Liu Hao Tjeng, Silke Paschen, and Andrea Severing,\\ //​CeRu<​sub>​4</​sub>​Sn<​sub>​6</​sub>:​ a strongly correlated material with nontrivial topology//,​\\ [[http://​www.nature.com/​articles/​srep17937|Nature scientific reports 5, 17937 (2015)]], arXiv, {{ :​publications:​scientific_reports_2015_sundermann.pdf | }}.
 +
 +  * [67] J.-P. Rueff, J. M. Ablett, F. Strigari, M. Deppe, M. W. Haverkort, L. H. Tjeng, and A. Severing,\\ //Absence of orbital rotation in superconducting CeCu<​sub>​2</​sub>​Ge<​sub>​2</​sub>//,​ \\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.91.201108|Phys. Rev. B 91, 201108 (2015)]], arXiv, {{ :​publications:​phys._rev._b_2015_rueff.pdf | }}.
 +
 +  * [66] D. Kasinathan, K. Koepernik, L. H. Tjeng, and M. W. Haverkort,​\\ //SmO thin films: A flexible route to correlated flat bands with nontrivial topology//, \\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.91.195127|Phys. Rev. B 91, 195127 (2015)]], arXiv, [pdf] {{ :​publications:​phys._rev._b_2015_kasinathan.pdf | }}.
 +
 +  * [65] S. Agrestini, Z. Hu, C.-Y. Kuo, M. W. Haverkort, K.-T. Ko, N. Hollmann, Q. Liu, E. Pellegrin, M. Valvidares, J. Herrero-Martin,​ P. Gargiani, P. Gegenwart, M. Schneider, S. Esser, A. Tanaka, A. C. Komarek, and L. H. Tjeng,\\ //​Electronic and spin states of SrRuO<​sub>​3</​sub>​ thin films: An x-ray magnetic circular dichroism study//, \\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.91.075127|Phys. Rev. B 91, 075127 (2015)]], arXiv, {{ :​publications:​phys._rev._b_2015_agrestini.pdf | }}.
 +
 +  * [64] F. Strigari, M. Sundermann, Y. Muro, K. Yutani, T. Takabatake, K.-D. Tsuei, Y. F. Liao, A. Tanaka, P. Thalmeier, M. W. Haverkort, L. H. Tjeng, and A. Severing,\\ //​Quantitative study of valence and configuration interaction parameters of the Kondo semiconductors CeM<​sub>​2</​sub>​Al<​sub>​10</​sub>​ (M = Ru, Os and Fe) by means of bulk-sensitive hard x-ray photoelectron spectroscopy//,​ \\ [[http://​www.sciencedirect.com/​science/​article/​pii/​S036820481500016X|J. Elec. Spec. Rel. Phen. 199, 56 (2015)]], arXiv, {{ :​publications:​journal_of_electron_spectroscopy_and_related_phenomena_2015_strigari.pdf | }}.
 +
 +
 +==== 2014 ====
 +
 +  * [63] S. Macke, A. Radi, J. E. Hamann-Borrero,​ A. Verna, M. Bluschke, S. Brück, E. Goering, R. Sutarto, F. He, G. Cristiani, M. Wu, E. Benckiser, H.-U. Habermeier, G. Logvenov, N. Gauquelin, G. A. Botton, A. P. Kajdos, S. Stemmer, G. A. Sawatzky, M. W. Haverkort, B. Keimer, and V. Hinkov,\\ //Element Specific Monolayer Depth Profiling//,​\\ [[http://​onlinelibrary.wiley.com/​doi/​10.1002/​adma.201402028/​abstract|Advanced Materials 26, 6545 (2014)]].
 +
 +  * [62] M. W. Haverkort, G. Sangiovanni,​ P. Hansmann, A. Toschi, Y. Lu and S. Macke,\\ //Bands, resonances, edge singularities and excitons in core level spectroscopy investigated within the dynamical mean-field theory//,\\ [[http://​epljournal.edpsciences.org/​articles/​epl/​abs/​2014/​23/​epl16738/​epl16738.html|Euro. Phys. Lett. 108 57004 (2014)]], arXiv, {{ :​publications:​europhys._lett._2014_haverkort.pdf | }}.
 +
 +  * [61] Y. Lu, M. Höppner, O. Gunnarsson, and M. W. Haverkort,​\\ //Efficient real frequency solver for dynamical mean field theory//,\\ [[http://​journals.aps.org/​prb/​abstract/​10.1103/​PhysRevB.90.085102|Phys. Rev. B 90 085102 (2014)]], arXiv, {{ :​publications:​phys._rev._b_2014_lu.pdf | }}.
 +
 +  * [60] C. N. Veenstra, Z.-H. Zhu, M. Raichle, B. M. Ludbrook, A. Nicolaou, B. Slomski, G. Landolt, S. Kittaka, Y. Maeno, J. H. Dil, I. S. Elfimov, M. W. Haverkort, and A. Damascelli,​\\ //​Spin-Orbital Entanglement and the Breakdown of Singlets and Triplets in Sr<​sub>​2</​sub>​RuO<​sub>​4</​sub>​ Revealed by Spin- and Angle-Resolved Photoemission Spectroscopy//,​\\ [[http://​journals.aps.org/​prl/​abstract/​10.1103/​PhysRevLett.112.127002|Phys. Rev. Lett. 112 127002 (2014)]], arXiv, {{ :​publications:​phys._rev._lett._2014_veenstra.pdf | }}.
 +
 +  * [59] Z.-H. Zhu, C. N. Veenstra, S. Zhdanovich, M. P. Schneider, T. Okuda, K. Miyamoto, S.-Y. Zhu, H. Namatame, M. Taniguchi, M. W. Haverkort, I. S. Elfimov, and A. Damascelli,​\\ //​Photoelectron Spin-Polarization Control in the Topological Insulator Bi<​sub>​2</​sub>​Se<​sub>​3</​sub>//,​\\ [[http://​journals.aps.org/​prl/​abstract/​10.1103/​PhysRevLett.112.076802|Phys. Rev. Lett. 112 076802 (2014)]], arXiv, {{ :​publications:​phys._rev._lett._2014_zhu.pdf | }}.
 +==== 2013 ====
 +
 +  * [58] Krzysztof Wohlfeld, Satoshi Nishimoto, M. W. Haverkort, and Jeroen van den Brink,\\ //​Microscopic origin of spin-orbital separation in Sr<​sub>​2</​sub>​CuO<​sub>​3</​sub>//,​\\ Phys. Rev. B 88 195138 (2013), arXiv, {{ :​publications:​physrevb_088_195138.pdf | }}
 +
 +  * [57] E. Benckiser, L. Fels, G. Ghiringhelli,​ M. Moretti Sala, T. Schmitt, J. Schlappa, ​ V. N. Strocov, N. Mufti, G. R. Blake, A. A. Nugroho, T. T. M. Palstra, ​ M. W. Haverkort, K. Wohlfeld, and M. Gruninger,​\\ //Orbital superexchange and crystal field simultaneously at play in YVO<​sub>​3</​sub>:​ Resonant inelastic x-ray scattering at the V L edge and the O K edge//,\\ Phys. Rev. B 88 205115 (2013), arXiv, {{ :​publications:​physrevb_088_205115.pdf | }}.
 +
 +  * [56] A. Frano, E. Schierle, M. W. Haverkort, Y. Lu, M. Wu, S. Blanco-Canosa,​ U. Nwankwo, A. V. Boris, P. Wochner, G. Cristiani, H. U. Habermeier, G. Logvenov, V. Hinkov, E. Benckiser, E. Weschke, and B. Keimer,\\ //Orbital Control of Noncollinear Magnetic Order in Nickel Oxide Heterostructures//,​\\ Phys. Rev. Lett. 111, 106804 (2013), arXiv, {{ :​publications:​physrevlett_111_106804.pdf | }}.
 +
 +  * [55] M. Wu, E. Benckiser, M. W. Haverkort, A. Frano, Y. Lu, U. Nwankwo, S. Bruck, ​ P. Audehm, E. Goering, S. Macke, V. Hinkov, P. Wochner, G. Christiani, S. Heinze, ​ G. Logvenov, H.-U. Habermeier, and B. Keimer,\\ //Strain and composition dependence of orbital polarization in nickel oxide superlattices//,​\\ Phys. Rev. B 88 125124 (2013), arXiv, {{ :​publications:​physrevb_088_125124.pdf | }}.
 +
 +  * [54] Z.-H. Zhu, C. N. Veenstra, G. Levy, A. Ubaldini, P. Syers, N. P. Butch, J. Paglione, M. W. Haverkort, I. S. Elfimov, and A. Damascelli,​\\ //​Layer-by-layer entangled spin-orbital texture of the topological surface state in Bi<​sub>​2</​sub>​Se<​sub>​3</​sub>//,​\\ Phys. Rev. Lett. 110, 216401 (2013), arXiv, {{ :​publications:​physrevlett_110_216401.pdf | }}.
 +
 +  * [53] F. Strigari, T. Willers, Y. Muro, K. Yutani, T. Takabatake, Z. Hu, S. Agrestini, C.-Y. Kuo, Y.-Y. Chin, H.-J. Lin, T. W. Pi, C. T. Chen, E. Weschke, E. Schierle, A. Tanaka, M. W. Haverkort, L. H. Tjeng, and A. Severing,\\ //Crystal field ground state of the orthorhombic Kondo semiconductors CeOs<​sub>​2</​sub>​Al<​sub>​10</​sub>​ and CeFe<​sub>​2</​sub>​Al<​sub>​10</​sub>//,​\\ Phys. Rev. B 87 125119 (2013), arXiv, {{ :​publications:​physrevb_087_125119.pdf | }}.
 +
 +==== 2012 ====
 +
 +  * [52] M. W. Haverkort, M. Zwierzycki, and O. K. Andersen,\\ //Multiplet ligand-field theory using Wannier orbitals//,​\\ Phys. Rev. B 85 165113 (2012), arXiv, {{ :​publications:​physrevb_085_165113.pdf | }}.
 +
 +
 +  * [51] T. Willers, F. Strigari, N. Hiraoka, Y. Q. Cai, M. W. Haverkort, K.-D. Tsuei, Y. F. Liao, S. Seiro, C. Geibel, F. Steglich, L. H. Tjeng, and A. Severing,\\ //​Determining the In-Plane Orientation of the Ground-State Orbital of CeCu<​sub>​2</​sub>​Si<​sub>​2</​sub>//,​\\ Phys. Rev. Lett. 109, 046401 (2012), arXiv, {{ :​publications:​physrevlett_109_046401.pdf | }}.
 +
 +  * [50] F. Strigari, T. Willers, Y. Muro, K. Yutani, T. Takabatake, Z. Hu, Y.-Y. Chin, S. Agrestini, H.-J. Lin, C. T. Chen, A. Tanaka, M. W. Haverkort, L. H. Tjeng, and A. Severing,\\ //​Crystal-field ground state of the orthorhombic Kondo insulator CeRu<​sub>​2</​sub>​Al<​sub>​10</​sub>//,​\\ Phys. Rev. B 86 081105 (2012), arXiv, {{ :​publications:​physrevb_086_081105.pdf | }}.
 +
 +  * [49] M. A. Hossain, B. Bohnenbuck, Y. D. Chuang, M. W. Haverkort, I. S. Elfimov, ​ A. Tanaka, A. G. Cruz Gonzalez, Z. Hu, H.-J. Lin, C. T. Chen, R. Mathieu, Y. Tokura, Y. Yoshida, L. H. Tjeng, Z. Hussain, B. Keimer, G. A. Sawatzky, and A. Damascelli,​\\ //Mott versus Slater-type metal-insulator transition in Mn-substituted Sr<​sub>​3</​sub>​Ru<​sub>​2</​sub>​O<​sub>​7</​sub>//,​\\ Phys. Rev. B 86 041102 (2012), arXiv, {{ :​publications:​physrevb_086_041102.pdf | }}.
 +
 +  * [48] S. Glawion, M. W. Haverkort, G. Berner, M. Hoinkis, G. Gavrilla, R. Kraus, M. Knopfer, M. Sing, and R. Claessen,\\ //​Unoccupied electronic structure of TiOCl studied using x-ray absorption near-edge spectroscopy//,​\\ J. Phys.: Condens. Matter 24, 255602 (2012), arXiv, {{ :​publications:​jphyscondensmatter_24_255602.pdf | }}.
 +
 +  * [47] P. Hansmann, M. W. Haverkort, A. Toschi, G. Sangiovanni,​ F. Rodolakis, J. P. Rueff, M. Marsi, and K. Held,\\ //Atomic and itinerant effects at the transition-metal x-ray absorption K pre-edge exemplified in the case of V<​sub>​2</​sub>​O<​sub>​3</​sub>//,​\\ Phys. Rev. B 85 115136 (2012), arXiv, {{ :​publications:​physrevb_085_115136.pdf | }}.
 +
 +  * [46] J. Schlappa, K. Wohlfeld, K. J. Hou, M. Mourigal, M. W. Haverkort, V. N. Stocov, L. Hozoi, C. Monney, S. Nishimoto, S. Singh, A. Revcolevschi,​ J.-S. Caux, L. Patthey, H. M. Ronnow, J. van den Brink, and T. Schmitt,\\ //​Spin-Orbit Separation in the quasi 1D Mott-insulator Sr<​sub>​2</​sub>​CuO<​sub>​3</​sub>//,​\\ Nature 485 82 (2012).
 +
 +==== 2011 ====
 +
 +  * [45] M. Le Tacon, G. Ghiringhelli,​ J. Chaloupka, M. Moretti Sala, V. Hinkov, M. W. Haverkort, M. Minola, M. Bakr, K. J. Zhou, S. Blanco-Canosa,​ C. Monney, Y. T. Song, G. L. Sun, C. T. Lin, G. M. De Luca, M. Salluzzo, G. Khaliullin, T. Schmitt, L. Braicovich, and B. Keimer,\\ //Intense paramagnon excitations in a large family of high-temperature superconductors//,​\\ Nature Physics (2011), arXiv.
 +
 +  * [44] E. Benckiser, M. W. Haverkort, S. Brück, E. Goering, S. Macke, A. Frañó, X. Yang, O. K. Andersen, G. Cristiani, H.-U. Habermeier, A. V. Boris, I. Zegkinoglou,​ P. Wochner, H.-J. Kim, V. Hinkov, and B. Keimer,\\ //Orbital reflectometry of oxide heterostructures//,​\\ Nature Materials 10, 189 (2011), arXiv.
 +
 +  * [43] S. Glawion, J. Heidler, M. W. Haverkort, L. C. Duda, T. Schmitt, V. N. Strocov, C. Monney, K. J. Zhou, A. Ruff, M. Sing, and R. Claessen,\\ //​Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl//,\\ Phys. Rev. Lett. 107, 107402 (2011), arXiv, {{ :​publications:​physrevlett_107_107402.pdf | }}.
 +
 +  * [42] N. Hiraoka, M. Suzuki, K. D. Tsuei, H. Ishii, Y. Q. Cai, M. W. Haverkort, C. C. Lee and W. Ku,\\ //dd excitations in three-dimensional q-space: A nonresonant inelastic X-ray scattering study on NiO//,\\ Europhys. Lett. 96, 37007 (2011), arXiv, {{ :​publications:​epl_096_37007.pdf | }}.
 +
 +  * [41] Subhra Sen Gupta, J. A. Bradley, M. W. Haverkort, G. T. Seidler, A. Tanaka, G. A. Sawatzky,\\ //​Coexistence of bound and virtual bound states in shallow-core to valence x-ray spectroscopies//,​\\ Phys. Rev. B 84 075134 (2011), arXiv, {{ :​publications:​physrevb_084_075134.pdf | }}.
 +
 +  * [40] F. Rodolakis, J.-P. Rueff, M. Sikora, I. Alliot, J.-P. Itie, F. Baudelet, S. Ravy, P. Wzietek, P. Hansmann, A. Toschi, M. W. Haverkort, G. Sangiovanni,​ K. Held, P. Metcalf, and M. Marsi,\\ //Evolution of the electronic structure of a Mott system across its phase diagram: X-ray absorption spectroscopy study of (V<​sub>​1-x</​sub>​Cr<​sub>​x</​sub>​)<​sub>​2</​sub>​O<​sub>​3</​sub>//,​\\ Phys. Rev. B 84, 245113 (2011), arXiv, {{ :​publications:​physrevb_084_245113.pdf | }}.
 +
 +  * [39] N. Hollmann, M. W. Haverkort, M. Benomar, M. Cwik, M. Braden, and T. Lorenz,\\ //Evidence for a temperature-induced spin-state transition of Co3+ in La<​sub>​2-x</​sub>​Sr<​sub>​x</​sub>​CoO<​sub>​4</​sub>//,​\\ Phys. Rev. B 83, 174435 (2011), arXiv, {{ :​publications:​physrevb_083_174435.pdf | }}.
 +
 +==== 2010 ====
 +
 +  * [38] M. W. Haverkort,​\\ //Theory of Resonant Inelastic X-Ray Scattering by Collective Magnetic Excitations//,​\\ Phys. Rev. Lett. 105, 167404 (2010), arXiv, {{ :​publications:​physrevlett_105_167404.pdf | }}.
 +
 +  * [37] F. Rodolakis, P. Hansmann, J.-P. Rueff, A. Toschi, M. W. Haverkort, G. Sangiovanni,​ A. Tanaka, T. Saha-Dasgupta,​ O. K. Andersen, K. Held, M. Sikora, I. Alliot, J.-P. Itié, F. Baudelet, P. Wzietek, P. Metcalf, and M. Marsi,\\ //​Inequivalent Routes across the Mott Transition in V<​sub>​2</​sub>​O<​sub>​3</​sub>​ Explored by X-Ray Absorption//,​\\ Phys. Rev. Lett. 104, 047401 (2010), arXiv, {{ :​publications:​physrevlett_104_047401.pdf | }}.
 +
 +  * [36] O. Gunnarsson, G. Sangiovanni,​ A. Valli, and M. W. Haverkort,​\\ //Fourier transformation and response functions//,​\\ Phys. Rev. B 82, 233104 (2010), arXiv, {{ :​publications:​physrevb_082_233104.pdf | }}.
 +
 +  * [35] G. M. De Luca, G. Ghiringhelli,​ M. Moretti Sala, S. Di Matteo, M. W. Haverkort, H. Berger, V. Bisogni, J. C. Cezar, N. B. Brookes, and M. Salluzzo,\\ //Weak magnetism in insulating and superconducting cuprates//,​\\ Phys. Rev. B 82, 214504 (2010), arXiv, {{ :​publications:​physrevb_082_214504.pdf | }}.
 +
 +  * [34] O. Gunnarsson, M. W. Haverkort, and G. Sangiovanni,​\\ //​Analytical continuation of imaginary axis data for optical conductivity//,​\\ Phys. Rev. B 82, 165125 (2010), arXiv, {{ :​publications:​physrevb_082_ 165125.pdf | }}.
 +
 +  * [33] O. Gunnarsson, M. W. Haverkort, and G. Sangiovanni,​\\ //​Analytical continuation of imaginary axis data using maximum entropy//,​\\ Phys. Rev. B 81, 155107 (2010), arXiv, {{ :​publications:​physrevb_081_155107.pdf | }}.
 +
 +  * [32] M. W. Haverkort, N. Hollmann, I. P. Krug, and A. Tanaka,\\ //Symmetry analysis of magneto-optical effects: The case of x-ray diffraction and x-ray absorption at the transition metal L<​sub>​2,​3</​sub>​ edge//,\\ Phys. Rev. B 82, 094403 (2010), arXiv, {{ :​publications:​physrevb_082_094403.pdf | }}.
 +
 +  * [31] T. Haupricht, R. Sutarto, M. W. Haverkort, H. Ott, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen, Z. Hu, and L. H. Tjeng,\\ //Local electronic structure of Fe<​sup>​2+</​sup>​ impurities in MgO thin films: Temperature-dependent soft x-ray absorption spectroscopy study//,\\ Phys. Rev. B 82, 035120 (2010), arXiv, {{ :​publications:​physrevb_082_035120.pdf | }}.
 +
 +  * [30] J. A. Bradley, S. Sen Gupta, G. T. Seidler, K. T. Moore, M. W. Haverkort, G. A. Sawatzky, S. D. Conradson, D. L. Clark, S. A. Kozimor, and K. S. Boland,\\ //Probing electronic correlations in actinide materials using multipolar transitions//,​\\ Phys. Rev. B 81, 193104 (2010), arXiv, {{ :​publications:​physrevb_081_193104.pdf | }}.
 +
 +==== 2009 ====
 +
 +  * [29] S. Altieri, M. Finazzi, H. H. Hsieh, M. W. Haverkort, H.-J. Lin, C. T. Chen, S. Frabboni, G. C. Gazzadi, A. Rota, S. Valeri, and L. H. Tjeng,\\ //Image charge screening: A new approach to enhance magnetic ordering temperatures in ultrathin correlated oxide films//,\\ Phys. Rev. B 79, 174431 (2009), arXiv, {{ :​publications:​physrevb_079_174431.pdf | }}.
 +
 +  * [28] R. A. Gordon, M. W. Haverkort, Subhra Sen Gupta and G. A. Sawatzky,\\ //​Orientation-dependent x-ray Raman scattering from cubic crystals: Natural linear dichroism in MnO and CeO<​sub>​2</​sub>//,​\\ J. Phys.: Conf. Ser. 190 012047 (2009), {{ :​publications:​jpconf9_190_012047.pdf | }}.
 +
 +  * [27] F. Rodolakis, P. Hansmann, J.-P. Rueff, A. Toschi, M. W. Haverkort, G. Sangiovanni,​ K. Held, M. Sikora, A. Congeduti, J-P. Itié, F. Baudelet, P. Metcalf and M. Marsi,\\ //​Electronic correlations in V<​sub>​2</​sub>​O<​sub>​3</​sub>​ studied with K-edge X-ray absorption spectroscopy//,​\\ J. Phys.: Conf. Ser. 190 012092 (2009), {{ :​publications:​jpconf9_190_012092.pdf | }}.
 +
 +==== 2008 ====
 +
 +  * [26] M. W. Haverkort, I. S. Elfimov, L. H. Tjeng, G. A. Sawatzky, and A. Damascelli,​\\ //Strong Spin-Orbit Coupling Effects on the Fermi Surface of Sr<​sub>​2</​sub>​RuO<​sub>​4</​sub>​ and Sr<​sub>​2</​sub>​RhO<​sub>​4</​sub>//,​\\ Phys. Rev. Lett. 101, 026406 (2008), arXiv, {{ :​publications:​physrevlett_101_026406.pdf | }}. 
 +
 +  * [25] M. A. Hossain, Z. Hu, M. W. Haverkort, T. Burnus, C. F. Chang, S. Klein, J. D. Denlinger, H.-J. Lin, C. T. Chen, R. Mathieu, Y. Kaneko, Y. Tokura, S. Satow, Y. Yoshida, H. Takagi, A. Tanaka, I. S. Efimov, G. A. Sawatzky, L. H. Tjeng, and A. Damascelli,​\\ //​Crystal-Field Level Inversion in Lightly Mn-Doped Sr<​sub>​3</​sub>​Ru<​sub>​2</​sub>​O<​sub>​7</​sub>//,​\\ Phys. Rev. Lett. 101, 016404 (2008), arXiv, {{ :​publications:​physrevlett_101_016404.pdf | }}.
 +
 +  * [24] P. Hansmann, A. Severing, Z. Hu, M. W. Haverkort, C. F. Chang, S. Klein, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen, B. Fåk, P. Lejay, and L. H. Tjeng,\\ //​Determining the Crystal-Field Ground State in Rare Earth Heavy Fermion Materials Using Soft-X-Ray Absorption Spectroscopy//,​\\ Phys. Rev. Lett. 100, 066405 (2008), arXiv, {{ :​publications:​physrevlett_100_066405.pdf | }}.
 +
 +  * [23] J. Schlappa, C. Schüßler-Langeheine,​ C. F. Chang, H. Ott, A. Tanaka, Z. Hu, M. W. Haverkort, E. Schierle, E. Weschke, G. Kaindl, and L. H. Tjeng,\\ //Direct Observation of t<​sub>​2g</​sub>​ Orbital Ordering in Magnetite//,​\\ Phys. Rev. Lett. 100, 026406 (2008), arXiv, {{ :​publications:​physrevlett_100_026406.pdf | }}.
 +
 +  * [22] I. P. Krug, F. U. Hillebrecht,​ H. Gomonaj, M. W. Haverkort, A. Tanaka, L. H. Tjeng and C. M. Schneider,​\\ //Magnetic coupling in highly ordered NiO/​Fe<​sub>​3</​sub>​O<​sub>​4</​sub>​ (110): Ultrasharp magnetic interfaces v.s. long-range magnetoelastic interactions//,​\\ Europhys. Lett. 81 17005 (2008), arXiv, {{ :​publications:​epl_081_26004.pdf | }}.
 +
 +  * [21] R. A. Gordon, G. T. Seidler, T. T. Fister, M. W. Haverkort, G. A. Sawatzky, A. Tanaka and T. K. Sham,\\ //High multipole transitions in NIXS: Valence and hybridization in 4f systems//,​\\ Europhys. Lett. 81 26004 (2008), arXiv, {{ :​publications:​epl_081_26004.pdf | }}.
 +
 +  * [20] N. Hollmann, M. W. Haverkort, M. Cwik, M. Benomar, M. Reuther, A. Tanaka and T. Lorenz,\\ //​Anisotropic susceptibility of La<​sub>​2-x</​sub>​Sr<​sub>​x</​sub>​CoO<​sub>​4</​sub>​ related to the spin states of cobalt//,\\ New J. Phys. 10 023018 (2008), arXiv, {{ :​publications:​njp8_2_023018.pdf | }}.
 +
 +  * [19] Michel van Veenendaal and M. W. Haverkort,​\\ //Effective operator for d-d transitions in nonresonant inelastic x-ray scattering//,​\\ Phys. Rev. B 77, 224107 (2008), arXiv, {{ :​publications:​physrevb_077_224107.pdf | }}.
 +
 +  * [18] T. Burnus, Z. Hu, H. H. Hsieh, V. L. J. Joly, P. A. Joy, M. W. Haverkort, Hua Wu, A. Tanaka, H.-J. Lin, C. T. Chen, and L. H. Tjeng,\\ //Local electronic structure and magnetic properties of LaMn0.5Co0.5O3 studied by x-ray absorption and magnetic circular dichroism spectroscopy//,​\\ Phys. Rev. B 77, 125124 (2008), arXiv, {{ :​publications:​physrevb_077_125124.pdf | }}.
 +
 +  * [17] A. Gössling, M. W. Haverkort, M. Benomar, Hua Wu, D. Senff, T. Möller, M. Braden, J. A. Mydosh, and M. Grüninger,​\\ //​Mott-Hubbard versus charge-transfer behavior in LaSrMnO<​sup>​4</​sup>​ studied via optical conductivity//,​\\ Phys. Rev. B 77, 035109 (2008), arXiv, {{ :​publications:​physrevb_077_035109.pdf | }}.
 +
 +  * [16] A. Gössling, R. Schmitz, H. Roth, M. W. Haverkort, T. Lorenz, J. A. Mydosh, E. Müller-Hartmann,​ and M. Grüninger,​\\ //​Mott-Hubbard exciton in the optical conductivity of YTiO3 and SmTiO3//,\\ Phys. Rev. B 78, 075122 (2008), arXiv, {{ :​publications:​physrevb_078_075122.pdf | }}.
 +
 +  * [15] I. P. Krug, F. U. Hillebrecht,​ M. W. Haverkort, A. Tanaka, L. H. Tjeng, H. Gomonay, A. Fraile-Rodríguez,​ F. Nolting, S. Cramm, and C. M. Schneider,​\\ //Impact of interface orientation on magnetic coupling in highly ordered systems: A case study of the low-indexed Fe<​sub>​3</​sub>​O<​sub>​4</​sub>/​NiO interfaces//,​\\ Phys. Rev. B 78, 064427 (2008), {{ :​publications:​physrevb_078_064427.pdf | }}.
 +
 +==== 2007 ====
 +
 +  * [14] M. W. Haverkort, A. Tanaka, L. H. Tjeng, and G. A. Sawatzky,\\ //​Nonresonant Inelastic X-Ray Scattering Involving Excitonic Excitations:​ The Examples of NiO and CoO//,\\ Phys. Rev. Lett. 99, 257401 (2007), arXiv, {{ :​publications:​physrevlett_099_257401.pdf | }}.
 +
 +==== 2006 ====
 +
 +  * [13] A. Podlesnyak, S. Streule, J. Mesot, M. Medarde, E. Pomjakushina,​ K. Conder, A. Tanaka, M. W. Haverkort, and D. I. Khomskii,\\ //​Spin-State Transition in LaCoO<​sub>​3</​sub>:​ Direct Neutron Spectroscopic Evidence of Excited Magnetic States//,\\ Phys. Rev. Lett. 97, 247208 (2006), arXiv, {{ :​publications:​physrevlett_097_247208.pdf | }}.
 +
 +  * [12] M. W. Haverkort, Z. Hu, J. C. Cezar, T. Burnus, H. Hartmann, M. Reuther, C. Zobel, T. Lorenz, A. Tanaka, N. B. Brookes, H. H. Hsieh, H.-J. Lin, C. T. Chen, and L. H. Tjeng,\\ //Spin State Transition in LaCoO<​sub>​3</​sub>​ Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism//,​\\ Phys. Rev. Lett. 97, 176405 (2006), arXiv, {{ :​publications:​physrevlett_097_176405.pdf | }}.
 +
 +  * [11] T. C. Koethe, Z. Hu, M. W. Haverkort, C. Schüßler-Langeheine,​ F. Venturini, N. B. Brookes, O. Tjernberg, W. Reichelt, H. H. Hsieh, H.-J. Lin, C. T. Chen, and L. H. Tjeng,\\ //Transfer of Spectral Weight and Symmetry across the Metal-Insulator Transition in VO2//,\\ Phys. Rev. Lett. 97, 116402 (2006), {{ :​publications:​physrevlett_097_116402.pdf | }}.
 +
 +  * [10] T. Burnus, Z. Hu, M. W. Haverkort, J. C. Cezar, D. Flahaut, V. Hardy, A. Maignan, N. B. Brookes, A. Tanaka, H.-H. Hsieh, H.-J. Lin, C.-T. Chen, and L. H. Tjeng,\\ //Valence, spin, and orbital state of Co ions in one-dimensional Ca<​sub>​3</​sub>​Co<​sub>​2</​sub>​O<​sub>​6</​sub>:​ An x-ray absorption and magnetic circular dichroism study//,\\ Phys. Rev. B 74, 245111 (2006), arXiv, {{ :​publications:​physrevb_074_245111.pdf | }}.
 +
 +==== 2005 ====
 +
 +  * [9] M. W. Haverkort, Z. Hu, A. Tanaka, W. Reichelt, S. V. Streltsov, M. A. Korotin, V. I. Anisimov, H. H. Hsieh, H.-J. Lin, C. T. Chen, D. I. Khomskii, and L. H. Tjeng,\\ //​Orbital-assisted metal-insulator transition in VO<​sub>​2</​sub>//,​\\ Phys. Rev. Lett. 95, 196404 (2005), arXiv, {{ :​publications:​physrevlett_095_196404.pdf | }}.
 +
 +  * [8] Hua Wu, M. W. Haverkort, Z. Hu, D. I. Khomskii, and L. H. Tjeng,\\ //Nature of magnetism in Ca<​sub>​3</​sub>​Co<​sub>​2</​sub>​O<​sub>​6</​sub>//,​\\ Phys. Rev. Lett. 95, 186401 (2005), arXiv, {{ :​publications:​physrevlett_095_186401.pdf | }}.
 +
 +  * [7] S. I. Csiszar, M. W. Haverkort, Z. Hu, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen, T. Hibma, and L. H. Tjeng,\\ //​Controlling Orbital Moment and Spin Orientation in CoO Layers by Strain//,\\ Phys. Rev. Lett. 95, 187205 (2005), arXiv, {{ :​publications:​physrevlett_095_187205.pdf | }}.
 +
 +  * [6] R. Rückamp, J. Baier, M. Kriener, M. W. Haverkort, T. Lorenz, G. S. Uhrig, L. Jongen, A. Möller, G. Meyer, and M. Grüninger,​\\ //​Zero-Field Incommensurate Spin-Peierls Phase with Interchain Frustration in TiOCl//,\\ Phys. Rev. Lett. 95, 097203 (2005), arXiv, {{ :​publications:​physrevlett_095_097203.pdf | }}.
 +
 +  * [5] M. W. Haverkort, Z. Hu, A. Tanaka, G. Ghiringhelli,​ H. Roth, M. Cwik, T. Lorenz, C. Schüßler-Langeheine,​ S. V. Streltsov, A. S. Mylnikova, V. I. Anisimov, C. de Nadai, N. B. Brookes, H. H. Hsieh, H.-J. Lin, C. T. Chen, T. Mizokawa, Y. Taguchi, Y. Tokura, D. I. Khomskii, and L. H. Tjeng,\\ //​Determination of the Orbital Moment and Crystal-Field Splitting in LaTiO<​sub>​3</​sub>//,​\\ Phys. Rev. Lett. 94, 056401 (2005), arXiv, {{ :​publications:​physrevlett_094_056401.pdf | }}.
 +
 +  * [4] R. Rückamp, E. Benckiser, M. W. Haverkort, H. Roth, T. Lorenz, A. Freimuth, L. Jongen, A. Möller, G. Meyer, P. Reutler, B. Büchner, A. Revcolevschi,​ S.-W. Cheong, C. Sekar, G. Krabbes, and M. Grüninger,​\\ //Optical study of orbital excitations in transition-metal oxides//,\\ New Journal of Physics 7, 144 (2005), {{ :​publications:​njp5_1_144.pdf | }}.
 +
 +==== 2004 ====
 +
 +  * [3] Z. Hu, Hua Wu, M. W. Haverkort, H. H. Hsieh, H.-J. Lin, T. Lorenz, J. Baier, A. Reichl, I. Bonn, C. Felser, A. Tanaka, C. T. Chen, and L. H. Tjeng,\\ //Different Look at the Spin State of Co<​sup>​3+</​sup>​ Ions in a CoO<​sub>​5</​sub>​ Pyramidal Coordination//,​\\ Phys. Rev. Lett. 92, 207402 (2004), arXiv, {{ :​publications:​physrevlett_092_207402.pdf | }}.
 +
 +  * [2] A. D. Rata, A. R. Chezan, T. Hibma, M. W. Haverkort, L. H. Tjeng, H. H. Hsieh, H.-J. Lin, and C. T. Chen,\\ // Growth and properties of strained VOx thin films with controlled stoichiometry//,​\\ Phys. Rev. B 69, 075404 (2004), arXiv, {{ :​publications:​physrevb_069_075404.pdf | }}.
 +
 +  * [1] M. W. Haverkort, S. I. Csiszar, Z. Hu, S. Altieri, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen, T. Hibma, and L. H. Tjeng,\\ // Magnetic versus crystal field linear dichroism in NiO thin films//,\\ Phys. Rev. B 69, 020408(R) (2004), arXiv, {{ :​publications:​physrevb_069_020408.pdf | }}.
 +
 +===== Invited contributions =====
 +
 +  * M. W. Haverkort and O. K. Andersen,\\ //Multiplet ligand-field theory using Wannier orbitals//,​\\ [[http://​www.fkf.mpg.de/​565441/​08_jb2012.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2011, (2012)]], {{ :​publications:​mpi_annual_report_2011b.pdf | }}.
 +
 +  * M. Le Tacon, J. Chaloupka, M. W. Haverkort, V. Hinkov, S. Blanco-Canosa,​ M. Bakr, G. L. Sun, Y. T. Song, C. T. Lin, G. Khaliullin, and B. Keimer,\\ //Intense paramagnon excitations in a large family of high-temperature superconductors//,​\\ [[http://​www.fkf.mpg.de/​565441/​08_jb2012.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2011, (2012)]], {{ :​publications:​mpi_annual_report_2011a.pdf | }}.
 +
 +
 +  * O. Gunnarsson, M. W. Haverkort and G. Sangiovanni,​\\ //​Analytical continuation of imaginary axis data using maximum entropy//,​\\ [[http://​www.fkf.mpg.de/​356051/​09_jb2011.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2010, (2011)]], {{ :​publications:​mpi_annual_report_2010b.pdf | }}.
 +
 +  * E. Benckiser, M. W. Haverkort, A. Frañó, O. K. Andersen, G. Cristiani, H.-U. Habermeier, A. V. Boris, I. Zegkinoglou,​ V. Hinkov and B. Keimer,\\ //Orbital reflectometry of oxide heterostructures//,​\\ [[http://​www.fkf.mpg.de/​356051/​09_jb2011.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2010, (2011)]], {{ :​publications:​mpi_annual_report_2010a.pdf | }}.
 +
 +  * M. W. Haverkort,​\\ //Theory of resonant inelastic X-ray scattering by collective magnetic excitations//,​\\[[http://​www.fkf.mpg.de/​173060/​10_jb2010.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2009, (2010)]], {{ :​publications:​mpi_annual_report_2009.pdf | }}.
 +
 +  * G.-Q. Liu, V. N. Antonov, M. W. Haverkort, O. Jepsen, and O. K. Andersen,\\ //​Coulumb-enhanced spin-orbit splitting: The missing piece in the Sr<​sub>​2</​sub>​RhO<​sub>​4</​sub>​ puzzle//, \\ [[http://​www.fkf.mpg.de/​173044/​12_jb2008.pdf|Internal Annual Report of the MPI-FKF Stuttgart 2008, (2009)]], {{ :​publications:​mpi_annual_report_2008.pdf | }}.
 +
 +  * J. Schlappa, C. Schüßler-Langeheine,​ C. F. Chang, H. Ott, A. Tanaka, Z. Hu, M. W. Haverkort, E. Schierle, E. Weschke, G. Kaindl and L. H. Tjeng,\\ //Cool magnetite: Frozen electrons below the Verwey temperature//,​\\ [[https://​www.helmholtz-berlin.de/​media/​media/​oea/​mediathek/​druckschriften/​infos/​bessy/​highlights2007.pdf|BESSY Highlights 2007, (2008)]], {{ :​publications:​bessy_highlights_2007.pdf | }}.
 +
 +  * M. W. Haverkort, Z. Hu, J. C. Cezar, T. Burnus, H. Hartmann, M. Reuther, C. Zobel, T. Lorenz, A. Tanaka, N. B. Brookes, H. H. Hsieh, H.-J. Lin, C. T. Chen and L. H. Tjeng,\\ //Spin state transition in LaCoO<​sub>​3</​sub>​ studied using soft X-ray absorption spectroscopy and magneic circular dichrosim//,​\\ [[http://​www.esrf.eu/​UsersAndScience/​Publications/​Highlights/​2006/​XAMS/​xams09|ESRF Highlights 2006 - X-Ray Absorption and Magnetic Scattering, (2007)]], {{ :​publications:​esrf_highlights_2006.pdf | }}.
 +
 +  * M. W. Haverkort, Z. Hu, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen and L. H. Tjeng,\\ //The Spin State Transition In LaCoO<​sub>​3</​sub>;​ Revising A Revision//, \\ [[http://​www.nsrrc.org.tw/​english/​publicYears.aspx?​ViewID=20071026152634092|NSRRC Activety Report - Research Highlights - Material Physics, (2007)]], {{ :​publications:​nsrrc_activity_report_2006_2007_06.pdf | }}.
 +
 +  * M. W. Haverkort, Z. Hu, S. I. Csiszar, T. Hibma, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen and L. H. Tjeng,\\ //​Controlling Orbital Moment and Spin Orientation in CoO Layers by Strain//, \\ [[http://​www.nsrrc.org.tw/​english/​publicYears.aspx?​ViewID=20061020162329283|NSRRC Activety Report - Research Highlights - Material Physics, (2006)]], {{ :​publications:​nsrrc_activity_report_2005_2006_10.pdf | }}.
 +
 +  * M. W. Haverkort, Z. Hu, A. Tanaka, H. H. Hsieh, H.-J. Lin, C. T. Chen and L. H. Tjeng,\\ //​Orbital-Assisted Metal-Insulator Transition in VO<​sub>​2</​sub>//,​ \\ [[http://​www.nsrrc.org.tw/​english/​publicYears.aspx?​ViewID=20061020162329283|NSRRC Activety Report - Research Highlights - Material Physics, (2006)]], {{ :​publications:​nsrrc_activity_report_2005_2006_09.pdf | }}.
 +
 +  * M. W. Haverkort, Z. Hu, H. H. Hsieh, H.-J. Lin, C. T. Chen and L. H. Tjeng,\\ //​Determination of the Crystal Field Splitting and the Orbital Moment in LaTiO<​sub>​3</​sub>//,​ \\ NSRRC Activety Report - [[http://​www.nsrrc.org.tw/​english/​publicYears.aspx?​ViewID=20060104172849601|Research Highlights - Material Physics, (2005)]], {{ :​publications:​nsrrc_activity_report_2004_2005_06.pdf | }}.
 +===== PhD. Thesis =====
 +  * M. W. Haverkort\\ //Spin and orbital degrees of freedom in transition metal oxides and oxide thin films studied by soft x-ray absorption spectroscopy,//​ \\ [[http://​kups.ub.uni-koeln.de/​1455/​|PhD. Thesis, University of Cologne, June 2005]], [[https://​arxiv.org/​abs/​cond-mat/​0505214|arXiv]],​ {{ :​publications:​2005_haverkort.pdf | }}.
 +
 +
 +{{ :​wiki:​head.gif?​nolink |}}

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