Dynamical local-field factors and effective interactions in the two-dimensional electron liquid

Atwal, G. S., Khalil, I. G., Ashcroft, N. W. (March 2003) Dynamical local-field factors and effective interactions in the two-dimensional electron liquid. Physical review B. Condensed matter and materials physics, 67 (11). p. 115107.

URL: http://journals.aps.org/prb/abstract/10.1103/PhysR...
DOI: 10.1103/PhysRevB.67.115107

Abstract

We present an analytical study of the dynamical local-field factors associated with the response of a homogeneous two-dimensional interacting electron liquid as functions of momentum, frequency, and density. We derive sum rules that constrain their asymptotic forms (in momentum and frequency) for both the spin-symmetric and spin-antisymmetric cases. Parametrized expressions for the local-field factors are proposed, based on all available sum rules and on many-body perturbation theory, and these are found to be in good agreement with quantum Monte Carlo calculations. Finally, these expressions are used to evaluate the effective electron-electron interaction in a local approximation for two-dimensional systems. It is shown that both the quantitative and qualitative behaviors of the interaction are sensitive to the inclusion of dynamical correlations.

Item Type: Paper
Uncontrolled Keywords: Monte Carlo calculations two-dimensional systems
Subjects: physics > biophysics
physics
CSHL Authors:
Communities: CSHL labs > Atwal lab
Depositing User: Matt Covey
Date: 12 March 2003
Date Deposited: 08 Jul 2013 20:58
Last Modified: 19 Dec 2016 21:37
URI: http://repository.cshl.edu/id/eprint/27848

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