Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-09-18
Int. J. Mod. Phys. B 17, 4733 (2003).
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
20 pages, 9 figures
Scientific paper
10.1142/S0217979203022878
The pre-existing literature on phenomena at the mesoscopic scale is concerned among other things with phase coherent transport. Phase coherent transport dominates at very low temperatures. With increase in temperature, as the system size becomes comparable to the inelastic mean free path phase incoherence sets in. This incoherence further leads to dephasing, and as a consequence purely quantum effects in electron transport give way to classical macroscopic behavior. In this work we consider two distinct phenomenological models of incoherent transport, the Coherent Absorption and Wave Attenuation models. We reveal some physical problems in the Coherent Absorption model as opposed to the Wave Attenuation model. We also compare our proposed model with experiments in case of the much studied peak to valley ratios in resonant tunneling diodes, magneto-conductance oscillations and Fano resonances in case of Aharonov-Bohm rings.
Benjamin Colin
Jayannavar Arun M.
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