Single particle and momentum relaxation times in two-dimensional electron systems (updated May 14, 2008)

Sarah J MacLeod; Theodore P. Martin; Adam P. Micolich; Alex R. Hamilton

doi:10.1117/12.759655

9 January 2008 Single particle and momentum relaxation times in two-dimensional electron systems (updated May 14, 2008)

Sarah J MacLeod, Theodore P. Martin, Adam P. Micolich, Alex R. Hamilton

Proceedings Volume 6800, Device and Process Technologies for Microelectronics, MEMS, Photonics, and Nanotechnology IV; 68001L (2008) https://doi.org/10.1117/12.759655
Event: SPIE Microelectronics, MEMS, and Nanotechnology, 2007, Canberra, ACT, Australia

Abstract

In this paper we present a detailed analysis of charged impurity scattering for two-dimensional electron systems in high quality GaAs heterostructures, using both first order perturbation theory and a more complex self-consistent multiple scattering theory. We calculate scattering due to both homogeneous background impurities and remote ionised impurities in modulation doped heterostructures. We consider both the quantum scattering time τ_q (important for quantum effects and devices) and the more conventional momentum relaxation time τ_t. Whereas the total scattering time gives an indication of the magnitude of the disorder, the ratio of τ_t / τ_q gives an indication as to the origin of the disorder.

Citation Download Citation

Sarah J MacLeod, Theodore P. Martin, Adam P. Micolich, and Alex R. Hamilton "Single particle and momentum relaxation times in two-dimensional electron systems (updated May 14, 2008)", Proc. SPIE 6800, Device and Process Technologies for Microelectronics, MEMS, Photonics, and Nanotechnology IV, 68001L (9 January 2008); https://doi.org/10.1117/12.759655

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