Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid He-3

Article

关键词: ROUGH-SURFACE;    WAVE SUPERCONDUCTORS;    FERMI SUPERFLUIDS;    ORDER;   

DOI  :  10.1103/PhysRevB.85.024524

来源: SCIE

【 摘 要 】

We study the odd-frequency Cooper pairs formed near the surface of superfluid He-3. The odd-frequency pair amplitude is closely related to the local density of states in the low-energy limit. We derive a formula relating explicitly the two quantities. This formula holds for an arbitrary boundary condition at the surface. We also present some numerical results on the surface odd-frequency pair amplitude in superfluid He-3-B. Those analytical and numerical results allow one to interpret the midgap surface density of states, observed recently by transverse acoustic impedance measurements on superfluid He-3-B, as the manifestation of the surface odd-frequency state.

【 授权许可】

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