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Author Lee, Hunpyo ♦ Zhang, Yu-Zhong ♦ Jeschke, Harald O. ♦ Valenti, Roser
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-12-21
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Superconductivity ♦ Condensed Matter - Strongly Correlated Electrons ♦ physics:cond-mat
Abstract We investigate the phase diagram of a two-band frustrated Hubbard model in the framework of dynamical mean field theory. While a first-order phase transition occurs from a paramagnetic (PM) metal to an antiferromagnetic (AF) insulator when both bands are equally frustrated, an intermediate AF metallic phase appears in each band at different $U_c$ values if only one of the two bands is frustrated, resulting in continuous orbital-selective phase transitions from PM metal to AF metal and AF metal to AF insulator. We argue that such intermediate phases are possibly related to the puzzling AF metallic state with small magnetization observed in undoped iron-pnictide superconductors as well as to the pseudogap features observed in optical experiments.
Description Comment: 4 pages, 5 figures, accepted in Phys. Rev. B(RC)
Educational Use Research
Learning Resource Type Article
Page Count 4


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