TY - JOUR
T1 - Orbital coupling and superconductivity in the iron pnictides
AU - Zhang, Junhua
AU - Sknepnek, Rastko
AU - Fernandes, Rafael M.
AU - Schmalian, Jörg
PY - 2009/6/4
Y1 - 2009/6/4
N2 - We demonstrate that strong interorbital interaction is very efficient to achieve superconductivity due to magnetic fluctuations in the iron pnictides. Fermi-surface states that are coupled by the antiferromagnetic wave vector are often of different orbital nature, causing pair-hopping interactions between distinct Fe-3d orbitals to become important. Performing a self-consistent fluctuation exchange calculation below Tc we determine the superconducting order parameter as function of intra- and interorbital couplings. We find an s± -pairing state with Tc 80 K for realistic parameters.
AB - We demonstrate that strong interorbital interaction is very efficient to achieve superconductivity due to magnetic fluctuations in the iron pnictides. Fermi-surface states that are coupled by the antiferromagnetic wave vector are often of different orbital nature, causing pair-hopping interactions between distinct Fe-3d orbitals to become important. Performing a self-consistent fluctuation exchange calculation below Tc we determine the superconducting order parameter as function of intra- and interorbital couplings. We find an s± -pairing state with Tc 80 K for realistic parameters.
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U2 - 10.1103/PhysRevB.79.220502
DO - 10.1103/PhysRevB.79.220502
M3 - Article
AN - SCOPUS:67650046639
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 220502
ER -