LETTER TO THE EDITOR: On the de Haas-van Alphen effect in inhomogeneous alloys
Abstract
We show that Landau-level broadening in alloys occurs naturally as a consequence of random variations in the local quasiparticle density, without the need to consider a relaxation time. This approach predicts Lorentzian-broadened Landau levels similar to those derived by Dingle using the relaxation-time approximation. However, rather than being determined by a finite relaxation time τ, the Landau-level widths instead depend directly on the rate at which the de Haas-van Alphen frequency changes with alloy composition. The results are in good agreement with recent data from three very different alloy systems.
- Publication:
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Journal of Physics Condensed Matter
- Pub Date:
- June 2001
- DOI:
- 10.1088/0953-8984/13/22/103
- arXiv:
- arXiv:cond-mat/0103476
- Bibcode:
- 2001JPCM...13L.463H
- Keywords:
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- Condensed Matter - Disordered Systems and Neural Networks;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 5 pages, no figures