Building a holographic superconductor with higher-derivative couplings
Building a holographic superconductor with higher-derivative couplings
复制标题
DOI：
10.1103/physrevd.88.086008
复制
发表时间：
2013-03
影响因子：
5
通讯作者：
Xiao-Mei Kuang;E. Papantonopoulos;G. Siopsis;Bin Wang
中科院分区：
文献类型：
--
作者：
Xiao-Mei Kuang;E. Papantonopoulos;G. Siopsis;Bin Wang
本文讨论了全息超导体的引力对偶，该超导体由一个U（1）$规范场，一个与带电AdS黑洞耦合的复标量场，以及U（1）$规范场与标量场之间的高阶导数耦合组成，耦合常数为$\ensuremath{\eta}$.在磁场的存在下，该系统具有本地化的空间依赖的液滴的解决方案，在低温限制，有较小的临界温度为$\ensuremath{\eta} g 0 $比液滴的解决方案没有相互作用项（$\ensuremath{\eta}=0$）。在弱磁场极限下，观察到相反的行为：临界温度随着我们增加$\ensuremath{\eta}$而增加。我们还计算了探测极限下的能隙，发现在$\ensuremath{\eta}l0$下的能隙比传统情况下的能隙（$\ensuremath{\eta}=0$）要大。
We discuss the gravitational dual of a holographic superconductor consisting of a $U(1)$ gauge field, a complex scalar field coupled to a charged AdS black hole and a higher-derivative coupling between the $U(1)$ gauge field and the scalar with coupling constant $\ensuremath{\eta}$. In the presence of a magnetic field, the system possesses localized spatially dependent droplet solutions which, in the low temperature limit, have smaller critical temperature for $\ensuremath{\eta}g0$ than the droplet solutions without the interaction term ($\ensuremath{\eta}=0$). In the weak magnetic field limit, the opposite behavior is observed: the critical temperature increases as we increase $\ensuremath{\eta}$. We also calculate the energy gap in the probe limit and find that it is larger for $\ensuremath{\eta}l0$ than the energy gap in the conventional case ($\ensuremath{\eta}=0$).