Thermopower induced by a supercurrent in superconductor-normal-metal structures

Details Thermopower induced by a supercurrent in superconductor-normal-metal structures Thermopower induced by a supercurrent in superconductor-normal-metal structures

2004-01-02

arxiv.org/abs/cond-mat/0401008v2

Phys. Rev. Lett. 92, 177004 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures; text compacted and material added

Scientific paper

10.1103/PhysRevLett.92.177004

We examine the thermopower Q of a mesoscopic normal-metal (N) wire in contact to superconducting (S) segments and show that even with electron-hole symmetry, Q may become finite due to the presence of supercurrents. Moreover, we show how the dominant part of Q can be directly related to the equilibrium supercurrents in the structure. In general, a finite thermopower appears both between the N reservoirs and the superconductors, and between the N reservoirs themselves. The latter, however, strongly depends on the geometrical symmetry of the structure.

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