The universality of phase resonances for disordered systems in a strong magnetic field |
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| Authors: | R. Hayn W. John |
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| Affiliation: | (1) Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Head Post Office, P.O. Box 79, SU-101000 Moscow, USSR;(2) Wissenschaftsbereich Theoretische Physik, Technische Universität Dresden, Mommsenstrasse 13, O-8027 Dresden, Germany |
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| Abstract: | The density of states of a three-dimensional disordered system in a strong magnetic field with a periodic back-ground potential is examined. The calculation of the density of states is reduced to the investigation of an effective one-dimensional problem. In the limit of weak disorder the density of states shows anomalies whenever the ratio of the wavelength and the lattice constant is a rational number. These phase resonances are investigated in detail for the band edges and for the middle of the band. |
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