標題: Mimic the optical conductivity in disordered solids via gauge/gravity duality
作者: Sun, Jia-Rui
Wu, Shang-Yu
Zhang, Hai-Qing
物理研究所
Institute of Physics
公開日期: 5-Feb-2014
摘要: We study the optical conductivity in a (2 + 1)-dimensional non-relativistic field theory holographically dual to a (3 + 1)-dimensional charged Lifshitz black brane within the Einstein-Maxwell-dilaton theory. Surprisingly, we find that the optical AC conductivity satisfies the nontrivial (non-)power law scaling in the high frequency regime rather than approaching to a constant when the dynamical critical exponent z > 1, which is qualitatively similar to those in various disordered solids in condensed matter systems. Besides, this (non-)power law scaling behavior shows some universality, which is robust against the temperatures. We argue that the peculiar scaling behavior of AC conductivity may stem from the couplings of the dilaton field with the gauge fields and also the logarithmic behavior near the boundary in the Lifshitz spacetime. (C) 2014 The Authors. Published by Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.physletb.2014.01.005
http://hdl.handle.net/11536/24039
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2014.01.005
期刊: PHYSICS LETTERS B
Volume: 729
Issue: 
起始頁: 177
結束頁: 184
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