Europhys. Lett.
Volume 67, Number 1, July 2004
Page(s) 77 - 83
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 01 June 2004
Europhys. Lett., 67 (1) , pp. 77-83 (2004)
DOI: 10.1209/epl/i2003-10280-2

Effective mass in quasi-two-dimensional systems

K. Morawetz

Institute of Physics, Chemnitz University of Technology - 09107 Chemnitz, Germany and Max-Planck-Institute for the Physics of Complex Systems - 01187 Dresden, Germany

(Received 1 December 2003; accepted in final form 3 May 2004)

The effective mass of the quasiparticle excitations in quasi-two-dimensional systems is calculated analytically. It is shown that the effective mass increases sharply when the density approaches the critical one of metal-insulator transition. This suggests a Mott-type transition rather than an Anderson-like transition. The experimental measurements can be reproduced in this way without any additional parameter.

71.30.+h - Metal-insulator transitions and other electronic transitions.
73.90.+f - Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures.
05.60.-k - Transport processes.

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