Fermionic boundary modes in two-dimensional noncentrosymmetric superconductors

Article

关键词: D-WAVE SUPERCONDUCTORS;    QUASI-PARTICLE STATES;    TUNNELING SPECTROSCOPY;    SYMMETRY-BREAKING;    INTERFACE;    SURFACE;    SPIN;    SOLITONS;    SR2RUO4;   

DOI  :  10.1103/PhysRevB.94.104523

来源: SCIE

【 摘 要 】

We calculate the spectrum of the Andreev boundary modes in a two-dimensional superconductor formed at an interface between two different nonsuperconducting materials, e.g., insulating oxides. Inversion symmetry is absent in this system, and both the electron band structure and the superconducting pairing are strongly affected by the spin-orbit coupling of the Rashba type. We consider isotropic s-wave pairing states, both with and without time-reversal symmetry breaking, as well as various d-wave states. In all cases, there exist subgap Andreev boundary states, whose properties, in particular, the number and location of the zero-energy modes, qualitatively depend on the gap symmetry and the spin-orbit coupling strength.

【 授权许可】

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