title: Experimental evidence for a Bragg glass density wave phase in a transition-metal dichalcogenide.
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 antidislocations occur in bound pairs and free dislocations are not observed. An analysis based on a Landau theory is presented showing how a strong local modulation may produce only a weak long range effect on the CDW phase.
authors: Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors: Jun-Ichi
authors: J
authors: Okamoto
authors: Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors: Carlos J
authors: CJ
authors: Arguello
authors: Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors: Ethan P
authors: EP
authors: Rosenthal
authors: Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors: Abhay N
authors: AN
authors: Pasupathy
authors: Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors: Andrew J
authors: AJ
authors: Millis