title: Glide-plane symmetry and superconducting gap structure of iron-based superconductors.
abstract: We consider the effect of glide-plane symmetry of the Fe-pnictogen/chalcogen layer in Fe-based superconductors on pairing in spin fluctuation models. Recent theories have proposed that so-called η-pairing states with nonzero total momentum can be realized and possess exotic properties such as odd parity spin singlet symmetry and time-reversal symmetry breaking. Here we show that η pairing is inevitable when there is orbital weight at the Fermi level from orbitals with even and odd mirror reflection symmetry in z; however, by explicit calculation, we conclude that the gap function that appears in observable quantities is identical to that found in earlier, 1 Fe per unit cell pseudocrystal momentum calculations.
authors: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.|Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.|Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors: Y
authors: Y
authors: Wang
authors: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.|Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: T
authors: T
authors: Berlijn
authors: Department of Physics, University of Florida, Gainesville, Florida 32611, USA.
authors: P J
authors: PJ
authors: Hirschfeld
authors: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors: D J
authors: DJ
authors: Scalapino
authors: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.|Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: T A
authors: TA
authors: Maier