Pairing mechanism in Fe pnictide superconductors

Details Pairing mechanism in Fe pnictide superconductors Pairing mechanism in Fe pnictide superconductors

2009-12-09

arxiv.org/abs/0912.1811v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

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 $d_{xz}$, $d_{yz}$
nearest-neighbour channel. This pairing mechanism implies a singlet
superconducting order parameter in iron pnictides.

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