Structure of the Local-field factor of the 2-D electron fluid. Possible evidence for correlated scattering of electron pairs

Abstract

The static local-field factor (LFF) of the 2-D electron fluid is calculated {\it nonperturbatively} using a mapping to a classical Coulomb fluid $[$Phys. Rev. Lett., {\bf 87}, 206$]$. The LFF for the paramagnetic fluid {\it differs markedly} from perturbation theory where a maximum near 2$k_F$ is expected. Our LFF has a quasi-linear small-k region leading to a maximum close to 3$k_F$, in agreent with currently available quantum Monte Carlo data. The structure in the LFF and its dependence on the density and temperature are interpretted as a signature of correlated scattering of electron pairs of opposite spin.The lack of structure at $2k_F$ implies weakened Friedel oscillations, Kohn anomalies etc.

4 pages, 3 figures, version 2 of condmat/0304034, see http://nrcphy1.phy.nrc.ca/ims/qp/chandre/chnc/ Changs in the text, figure 2 and updated references

References in corpus (6)

• Correlation energy and spin polarization in the 2D electron gas
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• Analytical expressions for the charge-charge local-field factor and the exchange-correlation kernel of a two-dimensional electron gas
• Spin-polarized stable phases of the 2-D electron fluid at finite temperatures
• The Equation of State and the Hugoniot of Laser Shock-Compressed Deuterium
• Singular Structure and Enhanced Friedel Oscillations in the Two-Dimensional Electron Gas

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• Polarizational stopping power of heavy-ion diclusters in two-dimensional electron liquids
• The effective mass and g-factor of the strongly correlated 2-D electron fluid. Evidence for a coupled-valley condensate in the Si system
• Effect of Singwi-Tosi-Land-Sjölander local field correction on spin relaxation in $n$-type GaAs quantum wells at low temperature
• Layer-thickness effects in quai-two dimensional electron liquids
• The Classical-Map Hyper-Netted-Chain (CHNC) technique for inhomogeneous electron systems. Application to quantum dots