V. Cvetkovic and Z. Tesanovic 2009 EPL 85 37002 doi:10.1209/0295-5075/85/37002
Multiband magnetism and superconductivity in Fe-based compounds
FREE ARTICLEV. Cvetkovic and Z. Tesanovic
Show affiliationsRecent 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 Tc itself are essentially tied to the multiband nature of the Fermi surface.
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Issue 3 (February 2009)
Received 12 November 2008, accepted for publication 18 January 2009
Published 13 February 2009
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Multiband magnetism and superconductivity in Fe-based compounds
V. Cvetkovic and Z. Tesanovic 2009 EPL 85 37002
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