Metal-Insulator Transition by Holographic Charge Density Waves

Yi Ling, Chao Niu, Jian-Pin Wu, Zhuo-Yu Xian, and Hongbao Zhang
Phys. Rev. Lett. 113, 091602 – Published 25 August 2014

Abstract

We construct a gravity dual for charge density waves (CDWs) in which the translational symmetry along one spatial direction is spontaneously broken. Our linear perturbation calculation on the gravity side produces the frequency dependence of the optical conductivity, which exhibits the two familiar features of CDWs, namely, the pinned collective mode and gapped single-particle excitation. These two features indicate that our gravity dual also provides a new mechanism to implement the metal to insulator phase transition by CDWs, which is further confirmed by the fact that dc conductivity decreases with the decreased temperature below the critical temperature.

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  • Received 11 April 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.091602

© 2014 American Physical Society

Authors & Affiliations

Yi Ling1,2,3,*, Chao Niu1,†, Jian-Pin Wu4,‡, Zhuo-Yu Xian1,§, and Hongbao Zhang5,∥

  • 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2Center for Relativistic Astrophysics and High Energy Physics, Department of Physics, Nanchang University, Nanchang 330031, China
  • 3State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 4Department of Physics, School of Mathematics and Physics, Bohai University, Jinzhou 121013, China
  • 5Theoretische Natuurkunde, Vrije Universiteit Brussel, and The International Solvay Institutes, Pleinlaan 2, B-1050 Brussels, Belgium

  • *lingy@ihep.ac.cn
  • niuc@ihep.ac.cn
  • jianpinwu@gmail.com
  • §xianzy@ihep.ac.cn
  • hzhang@vub.ac.be

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Issue

Vol. 113, Iss. 9 — 29 August 2014

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