arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.4928hep-thcond-mat.supr-con
收藏

p波全息超导体的超导相干长度和磁穿透深度

Superconducting Coherence Length and Magnetic Penetration Depth of a p-wave Holographic Superconductor

Hua-Bi Zeng, Zhe-Yong Fan, Hong-Shi Zong

摘要:

3+1维反德西特时空中的经典SU(2)Einstein-Yang-Mills理论与2+1维平坦时空中的p波超导体是对偶的。为了计算全息超导体在超导相变点附近的超导相干长度$ξ$,我们解析地研究了引力理论的微扰。在临界温度$T_c$附近,超导相干长度$ξ$与$(1-T/T_c)^{-1/2}$成正比。通过外加均匀小磁场,得到了磁穿透深度$λ\propto(T_c-T)^{1/2}$。结果符合Ginzburg-Landau理论。

英文摘要:

A classical SU(2) Einstein-Yang-Mills theory in 3+1 dimensional anti-de Sitter spacetime is believed to be dual to a p-wave superconductor in 2+1 dimensional flat spacetime. In order to calculate the superconductiong coherence length $ξ$ of the holographic superconductor near the superconducting phase transition point, we study the perturbation of the gravity theory analytically. The superconductiong coherence length $ξ$ is found to be proportional to $(1-T/T_c)^{-1/2}$ near the critical temperature $T_c$. We also obtain the magnetic penetration depth $λ\propto(T_c-T)^{1/2}$ by adding a small external homogeneous magnetic field. The results agree with the Ginzburg-Landau theory.

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。

↑