Effective mass in quasi-two-dimensional systemsK. 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.
© EDP Sciences 2004