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-Apr-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
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