標題: Thermoelectric effects in superconductors
作者: Kolacek, J
Yang, TJ
電子物理學系
Department of Electrophysics
公開日期: 1-六月-2005
摘要: It is widely believed that temperature gradient does not induce electric field in the superconductor and consequently that thermoelectric effects do not exist, or are negligible in these materials. This statement is correct only as far as effective electric field or gradient of the electrochemical potential is concerned. In normal metals temperature gradient generates effective electric field, which nulls out thermally induced diffusion current. In superconductor the diffusion current of quasiparticles is canceled by a counterflow of supercurrent. Superconducting current induces the true electric field, which can be approximated by gradient of the screened Bernoulli potential. It explains familiar giant thermomagnetic flux observed in superconducting thermocouples. Contactless measurements of thermoelectric effects are suggested.
URI: http://hdl.handle.net/11536/13625
ISSN: 0577-9073
期刊: CHINESE JOURNAL OF PHYSICS
Volume: 43
Issue: 3
起始頁: 612
結束頁: 615
顯示於類別:會議論文