Holographic p-wave superconductors from Gauss-Bonnet gravity

Holographic p-wave superconductors from Gauss-Bonnet gravity
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高斯-邦尼重力的全息 p 波超导体

DOI:
10.1103/physrevd.82.066007
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发表时间:
2010-07
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
通讯作者:
Zhang, Hai-Qing
Zhang, Hai-Qing
中科院分区:
其他
文献类型:
--
作者:
Cai, Rong-Gen;Nie, Zhang-Yu;Zhang, Hai-Qing

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我们研究了具有SU(2)Yang-Mills规范场的五维Gauss-Bonnet引力下的全息p波超导体。在探测近似下,我们发现随着Gauss-Bonnet系数的增大,矢量场的凝聚变得更加困难,各向异性电导率相对于凝聚方向的垂直分量和平行分量都减小了。我们还研究了准粒子激发的质量、带隙频率和p波超导体的直流电导。它们都依赖于Gauss-Bonnet系数。此外,当Gauss-Bonnet系数大于9/100时,我们观察到了凝聚的奇怪现象以及禁带频率与准粒子质量的关系,这是从对偶场理论的因果性出发的Gauss-Bonnet系数的上限。
We study the holographic p-wave superconductors in a five-dimensional Gauss-Bonnet gravity with an SU(2) Yang-Mills gauge field. In the probe approximation, we find that when the Gauss-Bonnet coefficient grows, the condensation of the vector field becomes harder, both the perpendicular and parallel components, with respect to the direction of the condensation, of the anisotropic conductivity decrease. We also study the mass of the quasiparticle excitations, the gap frequency and the DC conductivities of the p-wave superconductor. All of them depend on the Gauss-Bonnet coefficient. In addition, we observe a strange behavior for the condensation and the relation between the gap frequency and the mass of quasiparticles when the Gauss-Bonnet coefficient is larger than 9/100, which is the upper bound for the Gauss-Bonnet coefficient from the causality of the dual field theory.
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