First-principles-based s±-wave modeling for iron-based superconductors: Specific heat and nuclear magnetic relaxation rate

N. Nakai; H. Nakamura; Y. Ota; Y. Nagai; N. Hayashi; M. Machida

doi:10.1103/PhysRevB.82.094501

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First-principles-based s±-wave modeling for iron-based superconductors: Specific heat and nuclear magnetic relaxation rate

N. Nakai, H. Nakamura, Y. Ota, Y. Nagai, N. Hayashi, M. Machida

DOI 10.1103/PhysRevB.82.094501 · Physical Review B

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Abstract

In order to consistently explain controversial experimental results on superconducting states observed by different probes in typical iron-based superconductors, we construct a realistic multiband 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 s±-wave one fail to do. A key in the model is the existence of relatively small gaps which leads to material-dependent peculiarities.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaFeAs(O1-xFx) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LaFePO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Ba(Fe0.92Co0.08)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown