Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts

Details Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts

2008-07-08

arxiv.org/abs/0807.1319v2

Phys. Rev. Lett. 101, 216807 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, published version

Scientific paper

10.1103/PhysRevLett.101.216807

We calculate the corrections to the Sharvin conductance of ballistic multimode microcontacts that result from electron--electron scattering in the leads. Using a semiclassical Boltzmann equation, we obtain that these corrections are {\it positive} and scale with temperature as $T^2\ln(E_F/T)$ for three-dimensional contacts and as $T$ for two-dimensional ones. These results are relevant to recent experiments on 2DEG contacts.

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