期刊
EPL
卷 85, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/85/37002
关键词
-
资金
- NSF [DMR-0531159]
- U. S. Department of Energy Office of Science [DE-FG02-08ER46544]
Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced, highlighting the crucial role of puckering of As atoms in promoting d electron itinerancy and warding off large local-moment magnetism of Fe ions, the main enemy of superconductivity. Quantum many-particle effects in charge, spin and multiband channels are explored and a nesting-induced spin density-wave order is found in the parent compund. We argue that this largely itinerant antiferromagnetism and high T-c itself are essentially tied to the multiband nature of the Fermi surface. Copyright (C) EPLA, 2009
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