Generation of odd-frequency surface superconductivity with spontaneous spin current due to the zero-energy Andreev bound state
Shun Matsubara, Yukio Tanaka, Hiroshi Kontani
DOI 10.1103/PhysRevB.103.245138 · Physical Review B
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Abstract
We propose that the odd-frequency s wave (sodd wave) superconducting gap function, which is usually unstable in the bulk, naturally emerges at the edge of d wave superconductors. This prediction is based on the surface spin fluctuation pairing mechanism owing to the zero-energy surface Andreev bound state. The interference between bulk and edge gap functions triggers the d+sodd state, and the generated spin current is a useful signal uncovering the “hidden” odd-frequency gap. In addition, the edge sodd gap can be determined via the proximity effect on the diffusive normal metal. Furthermore, this study provides a decisive validation of the “Hermite odd-frequency gap function,” which has been an open fundamental challenge to this field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 100 | Pressure not reported | onset |
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