Experimental evidence for a Bragg glass density wave phase in a transition-metal dichalcogenide

Jun-ichi Okamoto; Carlos J. Arguello; Ethan P. Rosenthal; Abhay N. Pasupathy; Andrew J. Millis

doi:10.1103/PhysRevLett.114.026802

Experimental evidence for a Bragg glass density wave phase in a transition-metal dichalcogenide

Disordered Systems and Neural Networks 2015-05-06 v1

Authors: Jun-ichi Okamoto , Carlos J. Arguello , Ethan P. Rosenthal , Abhay N. Pasupathy , Andrew J. Millis

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Abstract

Analysis of the spatial dependence of current-voltage characteristics obtained from scanning tunneling microscopy experiments indicates that the charge density wave (CDW) occurring in NbSe $_2$ is subject to locally strong pinning by a non-negligible density of defects, but that on the length scales accessible in this experiment the material is in a "Bragg glass" phase where dislocations and anti-dislocations occur in bound pairs and free dislocations are not observed. A Landau theory-based analysis is presented showing how a strong local modulation may produce only a weak long range effect on the CDW phase.

Keywords

Bragg glass charge density wave transition-metal dichalcogenide NbSe2 pinning scanning tunneling microscopy

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@article{arxiv.1405.5561,
  title  = {Experimental evidence for a Bragg glass density wave phase in a transition-metal dichalcogenide},
  author = {Jun-ichi Okamoto and Carlos J. Arguello and Ethan P. Rosenthal and Abhay N. Pasupathy and Andrew J. Millis},
  journal= {arXiv preprint arXiv:1405.5561},
  year   = {2015}
}

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Experimental evidence for a Bragg glass density wave phase in a transition-metal dichalcogenide

Abstract

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