Surface density of states of s±-wave Cooper pairs in a two-band superconductor model

Seiichiro Onari; Yukio Tanaka

doi:10.1103/PhysRevB.79.174526

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Surface density of states of s±-wave Cooper pairs in a two-band superconductor model

Seiichiro Onari, Yukio Tanaka

DOI 10.1103/PhysRevB.79.174526 · Physical Review B

T1

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Abstract

We calculate the surface density of state (SDOS) of s±-wave Cooper pair in two-band superconductor model, where gap functions have different signs between two bands. We find that the Andreev bound state appears at surface due to the sign change in the gap function in the interband quasiparticle scattering. However, we do not obtain the zero-energy peak of SDOS in contrast to the d-wave case. The tunneling spectroscopy of s± wave is much more complex as compared to the d-wave case realized in high-Tc cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	26	Pressure not reported	unknown
BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown