Phase-coherent thermoelectricity and nonequilibrium Josephson current in Andreev interferometers

Article

关键词: CIRCUIT-THEORY;    METAL;    SUPERCURRENT;    IMBALANCE;   

DOI  :  10.1103/PhysRevB.103.134501

来源: SCIE

【 摘 要 】

We develop a detailed theory describing a nontrivial interplay between nonequilibrium effects and long-range quantum coherence in superconducting hybrid nanostructures exposed to a temperature gradient. We establish a direct relation between thermoelectric and Josephson effects in such structures and demonstrate that at temperatures exceeding the Thouless energy of our device both phase-coherent thermoelectric signal and the supercurrent may be strongly enhanced due to nonequilibrium low-energy quasiparticles propagating across the system without any significant phase relaxation. By applying a temperature gradient, one can drive the system into a well-pronounced p-junction state, thereby creating novel opportunities for applications of Andreev interferometers.

【 授权许可】

Free