Pairing mechanism in Fe pnictide superconductors
arXiv:0912.1811 · doi:10.1103/PhysRevB.82.132503
Abstract
By applying an exact unitary transformation to a two-band hamiltonian which also includes the effects due to large pnictogen polarizabilities, we show that an attractive spin-mediated Hubbard term appears in the , nearest-neighbour channel. This pairing mechanism implies a singlet superconducting order parameter in iron pnictides.
4 pages, 3 figures
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