Theory of correlated electrons

Quantum entanglement of spin, orbital and charge degrees of freedom of correlated electrons in oxides is the main topic of our interest. As members of the experimental department, we are strongly motivated by the exciting discoveries made in the lab and try to understand them in terms of many-body theories. Prediction of novel electronic phases in oxides and their interfaces/heterostructures is the main goal of our joint work within Keimer's department as well as with the members of Metzner's and Andersen's theory departments.

Recent Publications Magnetic excitation spectra of Sr2IrO4 probed by resonant inelastic x-ray scattering: Establishing links to cuprate superconductors J. Kim, D. Casa, M. H. Upton, T. Gog, Y.-J. Kim, J. F. Mitchell, M. van Veenendaal, M. Daghofer, J. van den Brink, G. Khaliullin, B. J. Kim. Phys. Rev. Lett. 108 (2012), 177003 Disorder induced transition between s+− and s++ states in two-band superconductors D. V. Efremov, M. M. Korshunov, O. V. Dolgov, A. A. Golubov, P. J. Hirschfeld. Phys. Rev. B 84 (2011), 180512(R) Effects of spin vacancies on magnetic properties of the Kitaev-Heisenberg model F. Trousselet, G. Khaliullin, and P. Horsch. Phys. Rev. B 84 (2011), 054409 Spin-orbital resonating valence bond liquid on a triangular lattice: Evidence from finite-cluster diagonalization J. Chaloupka and A. M. Oleś. Phys. Rev. B 83 (2011), 094406 Bulk and surface nanoscale hole density inhomogeneity in HgBa2CuO4+δ and Bi2Sr2CaCu2O8+δ cuprates W. Chen, G. Khaliullin, O. P. Sushkov. Phys. Rev. B 83 (2011), 064514 Enhanced Pairing Correlations near Oxygen Dopants in Cuprate Superconductors G. Khaliullin, M. Mori, T. Tohyama, S. Maekawa. Phys. Rev. Lett. 105 (2010), 257005 Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A2IrO3 J. Chaloupka, G. Jackeli, G. Khaliullin. Phys. Rev. Lett. 105 (2010), 027204 Theory of Raman and resonant inelastic x-ray scattering from collective orbital excitations in YTiO3 L. J. P. Ament, G. Khaliullin. Phys. Rev. B 81 (2010), 125118 Full list of publications...