標題: Influence of an external electric field on high-T-c superconductivity
作者: Lee, WD
Chen, JL
Yang, TJ
Chiou, BS
電子物理學系
電控工程研究所
Department of Electrophysics
Institute of Electrical and Control Engineering
公開日期: 20-四月-1996
摘要: The surface superconductivity induced by applying an electric field perpendicular to the surface of a high-T-c superconductor covered by an insulator and a gate electrode is studied theoretically. Taking the idea into account that the change of the surface carrier density confined in a thin screening layer modulates the transport properties of superconductors, we develop a simple method based on the Chen and Yang model to study the T-c shift dependence on the applied voltage in the frameworks of a Thomas-Fermi approximation and BCS theory. In such a case a novel boundary condition is introduced to modify the G-L equations. Solving the modified one, the T-c shift derived by the present model is similar in qualitative behavior to the Shapiro result, but much simpler in form. In addition, it is shown to be proportional to the applied field (the square of applied field) for thin film (thick film) for a given material. Based on our simple results, the critical current density J(c) and nucleation field H-c3 as functions of the applied voltage are easily derived.
URI: http://hdl.handle.net/11536/1346
ISSN: 0921-4534
期刊: PHYSICA C
Volume: 261
Issue: 1-2
起始頁: 167
結束頁: 172
顯示於類別:期刊論文


文件中的檔案:

  1. A1996UM98600021.pdf