Superconductivity in Fe and As based compounds: a bridge between MgB2 and cuprates

Details Superconductivity in Fe and As based compounds: a bridge between MgB2 and cuprates Superconductivity in Fe and As based compounds: a bridge between MgB2 and cuprates

2009-06-12

arxiv.org/abs/0906.2286v1

Physics

Condensed Matter

Superconductivity

8 pages, 3 figures, 1 table

Scientific paper

By interpreting various experimental data for the new high temperature FeAs type superconductors in terms of lattice mediated multi gap superconductivity, it is shown that these systems strongly resemble MgB2, however, with the distinction that local polaronic lattice effects exist. This fact establishes a connection to cuprate high temperature superconductors where polaron formation is essential for the pseudogap phase and the unconventional isotope effects observed there. However, similar to MgB2 and in contrast to cuprates the two superconducting gaps in the Fe-As based materials are isotropic s-wave gaps.

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