Europhys. Lett., 63 (5) , pp. 660-666 (2003)
Structure of the local-field factor of the 2D electron fluid. Possible evidence for correlated scattering of electron pairsM. W. C. Dharma-wardana and F. Perrot
Institute of Microstructural Sciences, National Research Council of Canada Ottawa, Canada, K1A 0R6 email@example.com
(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.
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.
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