| Issue |
Europhys. Lett.
Volume 63, Number 5, September 2003
|
|
|---|---|---|
| Page(s) | 660 - 666 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2003-00593-6 | |
| Published online | 01 November 2003 | |
Structure of the local-field factor of the 2D electron fluid. Possible evidence for correlated scattering of electron pairs
Institute of Microstructural Sciences, National Research Council of Canada Ottawa, Canada, K1A 0R6
Corresponding author: chandre@nrcphy1.phy.nrc.ca
Received:
13
June
2003
Accepted:
30
June
2003
The static local-field factor (LFF) of the 2D electron fluid is
calculated nonperturbatively using a mapping to a
classical Coulomb fluid (Phys. Rev. Lett., 87 (2001)
206404). The LFF for the paramagnetic fluid
differs markedly from
perturbation theory where a peak near 
is expected.
Our LFF has a quasi-linear small-k region leading to a peak
close to 
, in agreement with available quantum Monte
Carlo data. The structure in the LFF and its dependence on the
density and temperature are interpreted as a signature of
correlated scattering of electron pairs of opposite spin. The
lack of structure at implies weakened Friedel
oscillations, Kohn anomalies, etc.
PACS: 05.30.Fk – Fermion systems and electron gas / 71.10.-w – Theories and models of many-electron systems / 71.45.Gm – Exchange, correlation, dielectric and magnetic response functions, plasmons
© EDP Sciences, 2003
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