p-Wave superconductors in D-brane systems

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	p-Wave superconductors in D-brane systems
	Bu, YY
刊名	NUCLEAR PHYSICS B
	2012
卷号	864 期号:3 页码:806-822
关键词	STRING THEORY
ISSN号	0550-3213
通讯作者	Bu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	In this work we take the intersecting D-brane models to explore some properties of p-wave superconductor at strong coupling. Our studies are focused on four-dimensional spacetime, which is not completely researched as in planar case. Optimistically, the AdS/CFT approach to superconductor, or more precisely superconducting-like phase transition, can give us some intuitions about mysterious high T-c superconductors. Concretely, we use defect D4/D6 and D4/D4 (noncritical) models to carry out comparative investigations. To make the system in the finite temperature bath, we assume that the superconducting phase is in the deconfined and chiral symmetry restoring phase for black D4-brane geometry. For the background fields, we use both analytical and numerical methods to solve the coupled nonlinear equations of motion. Near the phase transition, both methods give the mean filed behavior for the superconducting condensate. We then study gauge field perturbations of the systems to probe the AC conductivity. Similar to previous results, there comes out a gap in low frequency regime and the conductivity gets exponentially small as the condensation is enhanced. In contrast to previous investigations, we also compute the AC conductivity along the x direction, which needs to study a coupled sets of fluctuation modes. This shows us the anisotropic feature of p-wave superconductors. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Physics
收录类别	SCI
资助信息	MPS-CAS Doctoral Training program
原文出处	http://dx.doi.org/10.1016/j.nuclphysb.2012.07.014
语种	英语
WOS记录号	WOS:000308049700015
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14982]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Bu, YY. p-Wave superconductors in D-brane systems[J]. NUCLEAR PHYSICS B,2012,864(3):806-822.
APA	Bu, YY.(2012).p-Wave superconductors in D-brane systems.NUCLEAR PHYSICS B,864(3),806-822.
MLA	Bu, YY."p-Wave superconductors in D-brane systems".NUCLEAR PHYSICS B 864.3(2012):806-822.