Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-07-30
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 1 figure. Submitted to Phys. Rev. B
Scientific paper
We study the problem of electronic conduction in mesoscopic systems when the electrons are allowed to interact not only with static impurities, but also with a scatterer (a phase breaker(PB)) that possesses internal degrees of freedom. We first analyze the role of the PB in reducing the coherent interference effects in a one-electron quantum-mechanical system. In the many-electron system we can make a number of quite general statements within the framework of linear-response theory and the random-phase approximation. We cannot calculate the conductivity tensor in full generality: we thus resort to a model, in which that tensor can be expressed entirely in a single-electron picture. The resulting zero-temperature conductance can be written in terms of the total transmission coefficient at the Fermi energy, containing an additional trace over the states of the PB.
Imry Yoseph
Mello Pier A.
Shapiro Boris
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