Monday, May 6, 2013

1305.0605 (Fan Yang et al.)

Fermiology, Orbital Order, Orbital Fluctuation and Cooper Pairing in
Iron-based Superconductors

Fan Yang, Fa Wang, Dung-Hai Lee
We address two important issues that arise in recent studies of iron-based superconductivity. (1) Why are the T_c of A_xFe_{2-y}Se_2 and the single unit cell FeSe on SrTiO$_3$ so high despite both only have electron pockets? (2) What (if any) are the effects of orbital order and orbital fluctuation on the Cooper pairing. Our conclusions are summarized in the third paragraph of the paper.
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