| Issue |
Europhys. Lett.
Volume 67, Number 4, August 2004
|
|
|---|---|---|
| Page(s) | 552 - 558 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2004-10098-4 | |
| 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: chandre@argos.phy.nrc.ca
Received:
16
January
2004
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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