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First-principles-based pm s-wave modelling for iron-based superconductors:Studies for specific heat and nuclear magnetic relaxation rate

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arxiv 0909.1195 v1 pith:EMXHBKRF submitted 2009-09-07 cond-mat.supr-con

First-principles-based pm s-wave modelling for iron-based superconductors:Studies for specific heat and nuclear magnetic relaxation rate

classification cond-mat.supr-con
keywords modelwaveiron-basedsuperconductorscalculationcombiningconsistentlyconstruct
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In order to consistently explain controversial experimental results on superconducting states observed by different probes in typical iron-based superconductors, we construct a realistic multi-band $\pm s$-wave pairing model by combining the quasiclassical formalism with the first-principles calculation. The model successfully resolves the controversies in contrast to the fact that simplified models such as two-band $\pm s$-wave one fail to do. A key in the model is the existence of relatively small gaps which leads to material-dependent peculiarities.

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