Volume 67, Number 4, August 2004
|Page(s)||552 - 558|
|Published online||01 August 2004|
The effective mass and the -factor of the strongly correlated 2D electron fluid. Evidence for a coupled-valley state in the system
Institute of Microstructural Sciences, National Research Council of Canada Ottawa, Canada, K1A 0R6
Corresponding author: email@example.com
Accepted: 9 June 2004
The effective mass m*, and the Landé g-factor of the uniform 2D electron system (2DES) are calculated as a function of the spin polarization ζ, and the density parameter rs, using a non-perturbative analytic approach. Our theory is in good accord with the susceptibility data for the simple 2DES, and in excellent agreement with the two-valley -2DES data of Shashkin et al. While g* is enhanced in , m* is enhanced in . The two-valley susceptibility is treated within a coupled-mode (coupled-valley) approach. The coupled-valley model is confirmed by comparison with the Quantum Monte Carlo results for a 4-component 2DES.
PACS: 05.30.Fk – Fermion systems and electron gas / 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.45.Gm – Exchange, correlation, dielectric and magnetic response functions, plasmons
© EDP Sciences, 2004
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