On the de Haas-van Alphen effect in inhomogeneous alloys

Details On the de Haas-van Alphen effect in inhomogeneous alloys On the de Haas-van Alphen effect in inhomogeneous alloys

2001-03-23

arxiv.org/abs/cond-mat/0103476v1

J. Phys.: Condens. Matter 13 L463 (2001)

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, no figures

Scientific paper

10.1088/0953-8984/13/22/103

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 $\tau$, 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.

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