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Phys. Rev. Lett. 80, 137–140 (1998)

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

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R. Ketzmerick1,2, K. Kruse2, and T. Geisel1,2,*
1Institute for Theoretical Physics, University of California Santa Barbara, California 93106
2Max-Planck-Institut für Strömungsforschung und Institut für Nichtlineare Dynamik der Universität Göttingen, Bunsenstraße 10, D-37073 Göttingen, Germany

Received 5 May 1997; published in the issue dated 5 January 1998

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.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.137
DOI:
10.1103/PhysRevLett.80.137
PACS:
71.30.+h, 03.65.-w, 05.45.+b

*Present and permanent address.

 
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