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

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

2009-12-25

arxiv.org/abs/0912.4928v4

Phys.Rev.D81:106001,2010

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 0 figures, three references added,accepted by PRD

Scientific paper

10.1103/PhysRevD.81.106001

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 $\xi$ of the holographic superconductor near the superconducting phase transition point, we study the perturbation of the gravity theory analytically. The superconductiong coherence length $\xi$ 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 $\lambda\propto(T_c-T)^{1/2}$ by adding a small external homogeneous magnetic field. The results agree with the Ginzburg-Landau theory.

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