Avoided Band Crossings: Tuning Metal-Insulator Transitions in Chaotic Systems

Details Avoided Band Crossings: Tuning Metal-Insulator Transitions in Chaotic Systems Avoided Band Crossings: Tuning Metal-Insulator Transitions in Chaotic Systems

1997-09-04

arxiv.org/abs/cond-mat/9709054v2

Phys. Rev. Lett. 80, 137 (1998)

Physics

Condensed Matter

4 pages, 5 figures, minor changes (figure completed, typo corrected), to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.80.137

We show that avoided crossings of energy bands may give rise to a variety of phenomena such as transitions from metal to insulator and vice versa, changes in localization lengths, and changes in the fractal dimension of energy spectra. We explain the occurrence of these phenomena in the kicked Harper model under classically chaotic conditions and predict them to occur in other systems.

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