A novel mechanism to generate FFLO states in holographic superconductors
A novel mechanism to generate FFLO states in holographic superconductors
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DOI：
10.1016/j.physletb.2013.02.018
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发表时间：
2012-10
影响因子：
4.4
通讯作者：
James Alsup;E. Papantonopoulos;G. Siopsis
中科院分区：
文献类型：
--
作者：
James Alsup;E. Papantonopoulos;G. Siopsis
讨论了在强耦合超导体中建立FFLO态引力对偶的新机制。引力理论利用两个U（1）规范场和一个标量场耦合到一个带电的AdS黑洞。第一个规范场与标量耦合，在临界温度以下产生电荷凝聚，第二个规范场提供了边界理论中的自旋耦合。标量在第二规范场下是中性的。通过开启爱因斯坦张量和标量之间的相互作用，结果表明，在低温极限下，非均匀溶液比均匀溶液具有更高的临界温度，从而产生FFLO态。
We discuss a novel mechanism to set up a gravity dual of FFLO states in strongly coupled superconductors. The gravitational theory utilizes two U(1) gauge fields and a scalar field coupled to a charged AdS black hole. The first gauge field couples with the scalar sourcing a charge condensate below a critical temperature, and the second gauge field provides a coupling to spin in the boundary theory. The scalar is neutral under the second gauge field. By turning on an interaction between the Einstein tensor and the scalar, it is shown that, in the low temperature limit, an inhomogeneous solution possesses a higher critical temperature than the homogeneous case, giving rise to FFLO states.