Quasiparticle effective-mass divergence in two-dimensional electron systems

Quasiparticle effective mass for the two- and three-dimensional electron gas.

We calculate the quasiparticle effective mass for the electron gas in two and three dimensions in the metallic region. We employ the single particle scattering potential coming from the Sjölander-Stott theory and enforce the Friedel sum rule by adjusting the effective electron mass in a scattering calculation. In 3D our effective mass is a monotonically decreasing function of rs throughout the ...

Effective mass in quasi two-dimensional systems

– 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 of transition rather than an Anderson-like transition. The experimental measurements can be reproduced in this way without any...

Effective mass suppression in dilute, spin-polarized two-dimensional electron systems.

We report effective mass (m*) measurements, via analyzing the temperature dependence of the Shubnikov-de Haas oscillations, for dilute, interacting, two-dimensional electron systems (2DESs) occupying a single conduction-band valley in AlAs quantum wells. When the 2DES is partially spin-polarized, m* is larger than its band value, consistent with previous results on various 2DESs. However, as we...

Many-body Effective Mass Enhancement in a Two-dimensional Electron Liquid

Effective mass of two-dimensional electron gas in an Al 0.2 Ga 0.8 N/GaN heterojunction