Gauss-Bonnet holographic superconductors
Gauss-Bonnet holographic superconductors
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DOI：
10.1007/jhep12(2010)029
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发表时间：
2010-09
影响因子：
5.4
通讯作者：
Luke Barclay;R. Gregory;S. Kanno;P. Sutcliffe
中科院分区：
文献类型：
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作者：
Luke Barclay;R. Gregory;S. Kanno;P. Sutcliffe
本文用数值方法和解析方法研究了五维Einstein-Gauss-Bonnet引力中的全息超导体。我们发现超导体的临界温度随着逆反应的增加而降低，尽管高斯-博内耦合的影响更微妙：临界温度首先降低，然后随着耦合以逆反应依赖的方式趋向于陈-西蒙斯值而增加。计算了系统的电导率，找到了系统的能隙，指出了反反应和高曲率的作用都是增大能隙比差距ω g/Tc，因此这类超导体不存在普适关系.
We study holographic superconductors in five dimensional Einstein-Gauss-Bonnet gravity both numerically and analytically. We find the critical temperature of the superconductor decreases as backreaction is increased, although the effect of the Gauss-Bonnet coupling is more subtle: the critical temperature first decreases then increases as the coupling tends towards the Chern-Simons value in a backreaction dependent fashion. We compute the conductivity of the system, finding the energy gap, and show that the effect of both backreaction and higher curvature is to increase the gap ratio ω g/T c, thus there is no universal relation for these superconductors.