標題: | Exact solution of the Ginzburg-Landau equation for the upper critical field of a d(x2-y2) superconductor |
作者: | Dai, MC Yang, TJ Ting, CS 電子物理學系 Department of Electrophysics |
公開日期: | 1-四月-1999 |
摘要: | A d(x2-y2) superconductor is modeled as the superconducting layers in the a-b plane, whose coupling in the c direction is approximated by the effective mass, within the Ginzburg-Landau theory. In this work, this model is applied to the system where the, coherence length along the c direction is greater than the layer spacing. Based on our model, we calculate the upper critical field in a magnetic field lying in a-e plane and tilted by an angle from the c axis. According to our results, the curvature of H-c2(T) is upward, and the slope - dH(c2)(T)/dT depends on the angle between the c axis and the external field. The most interesting feature is that the ratio of the c-direction parameter related to the effective mass to the n-b plane parameter connected with the effective mass can influence H-c2. As the rafio is decreased, H-c2. becomes increased. We also find that there is no admixture of s-wave component in the critical regime and believe that the upward curvature of the H-c2(T) is the characteristic property of a d-wave superconductor. [S0163-1829(99)01914-1]. |
URI: | http://dx.doi.org/10.1103/PhysRevB.59.9508 http://hdl.handle.net/11536/31408 |
ISSN: | 1098-0121 |
DOI: | 10.1103/PhysRevB.59.9508 |
期刊: | PHYSICAL REVIEW B |
Volume: | 59 |
Issue: | 14 |
起始頁: | 9508 |
結束頁: | 9513 |
顯示於類別: | 期刊論文 |