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arXiv 0910.4475hep-th
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全息超导体的涡旋晶格

Vortex lattice for a holographic superconductor

Kengo Maeda, Makoto Natsuume, Takashi Okamura

摘要:

研究了由带电标量凝聚体构成的超导体的(2+1)维全息模型中的涡旋晶格解。该解是在二阶相变附近微扰得到的,是Abrikosov晶格的全息实现。在磁场的临界值以下,溶液具有比正常状态低的自由能。自由能量密度和超导电流都是用非局域函数表示的,但在长波长处,它们都退化为Ginzburg-Landau(GL)理论的表达式。因此,三角形晶格成为最有利的解决方案,在第二类超导体的GL理论。

英文摘要:

We investigate the vortex lattice solution in a (2+1)-dimensional holographic model of superconductors constructed from a charged scalar condensate. The solution is obtained perturbatively near the second-order phase transition and is a holographic realization of the Abrikosov lattice. Below a critical value of magnetic field, the solution has a lower free energy than the normal state. Both the free energy density and the superconducting current are expressed by nonlocal functions, but they reduce to the expressions in the Ginzburg-Landau (GL) theory at long wavelength. As a result, a triangular lattice becomes the most favorable solution thermodynamically as in the GL theory of type II superconductors.

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