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arXiv 0902.3279cond-mat.supr-con
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非常规超导体自旋晶格弛豫率的正常态与超导态之比

The ratio of normal state to superconducting state of spin lattice relaxation rate of unconventional superconductors

P. Udomsamuthirun, J. Wanghunklang

摘要:

本文从BCS弱耦合方程出发,导出了非常规超导体的正常超导态与自旋晶格弛豫速率之比的简单表达式。我们所考虑的非常规超导体具有d波、3He A相和p波三种序参量,这是Parker和Haas[7]所做的三维序参量。通过一些数值近似和边界条件,我们可以在序参量与温度的幂级数中找到自旋晶格弛豫速率的正常态与超导态之比。我们的数值计算清楚地显示了低于临界温度的相干峰,这与Parker和Haas[7]一致。这些结果与认为相干峰是s波超导体的唯一性质的观点不一致。然而,从我们的计算中,我们可以得出结论,非常规超导体可以显示出相干峰。

英文摘要:

In this research, we derive a simple expression for the ratio of normal state superconducting state of spin lattice relaxation rate of unconventional superconductors from the BCS weak-coupling equation. The unconventional superconductors we consider have three types of order parameters as d-wave, 3He A-phase and p-wave 3-dimensional order parameter that had been done before by Parker and Haas[7].After using some numerical approximations and some boundary conditions, we can find the ratio of normal state to superconducting state of spin lattice relaxation rate in power series of temperature dependent order parameters and temperature. Our numerical calculations show the coherence peak below critical temperature clearly that are consistent with Parker and Haas[7]. These results do not agree with the believed that the coherence peak is the only property of s-wave superconductor. However from our calculation, we can conclude that the unconventional superconductors can show the coherence peaks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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