Disorder effect on the localization/delocalization in incommensurate potential

Details Disorder effect on the localization/delocalization in incommensurate potential Disorder effect on the localization/delocalization in incommensurate potential

2006-04-05

arxiv.org/abs/cond-mat/0604120v1

Phys. Rev. B 74, 121101(R) (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures (7 files), RevTeX

Scientific paper

10.1103/PhysRevB.74.121101

The interplay between incommensurate (IC) and random potentials is studied in a two-dimensional symplectic model with the focus on localization/delocalization problem. With the IC potential only, there appear wavefunctions localized along the IC wavevector while extended perpendicular to it. Once the disorder potential is introduced, these turn into two-dimensional anisotropic metallic states beyond the scale of the elastic mean free path, and eventually becomes localized in both directions at a critical strength of the disorder. Implications of these results to the experimental observation of the IC-induced localization is discussed.

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