Electron-electron interaction at decreasing $k_Fl$

Details Electron-electron interaction at decreasing $k_Fl$ Electron-electron interaction at decreasing $k_Fl$

2002-09-25

arxiv.org/abs/cond-mat/0209584v1

Phys. Rev. B 67, 205306 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.67.205306

The contribution of the electron-electron interaction to conductivity is analyzed step by step in gated GaAs/InGaAs/GaAs heterostructures with different starting disorder. We demonstrate that the diffusion theory works down to $k_F l\simeq 1.5-2$, where $k_F$ is the Fermi quasimomentum, $l$ is the mean free paths. It is shown that the e-e interaction gives smaller contribution to the conductivity than the interference independent of the starting disorder and its role rapidly decreases with $k_Fl$ decrease.

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