Absence of Two-Dimensional Bragg Glasses

Details Absence of Two-Dimensional Bragg Glasses Absence of Two-Dimensional Bragg Glasses

1998-07-20

arxiv.org/abs/cond-mat/9807281v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, REVTEX, 3 figures included. Further information can be obtained from chenz@physics.rutgers.edu

Scientific paper

10.1103/PhysRevLett.82.1935

The stability to dislocations of the elastic phase, or ``Bragg glass'', of a randomly pinned elastic medium in two dimensions is studied using the minimum-cost-flow algorithm for a disordered fully-packed loop model. The elastic phase is found to be unstable to dislocations due to the quenched disorder. The energetics of dislocations are discussed within the framework of renormalization group predictions as well as in terms of a domain wall picture.

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