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.
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: | https://repository.cshl.edu/id/eprint/27848 |
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