On the transit time of electrons in resonant structures

Gastón García-Calderón and Alberto Rubio

Physica A: Statistical Mechanics and its Applications, 1994, vol. 207, issue 1, 452-456

Abstract: A resonance formalism based on the notions of partial decay widths and resonance energy [1] is used to compare the transmission phase time, the dwell time and the Larmor time near resonance energy for coherent processes in one dimension. It turns out that except for the case of full transmission, i.e., the transmission coefficient equal to unity, the above notions do not yield an appropriate definition for the transit time of an electron through the system. On the other hand, the resonance formalism is used to support an alternative definition of the transit time given by τtr = 14(h̷/Γ0n + h̷/ΓLn) where Γ0n and ΓLn stand for the two partial decay widths associated to the corresponding two channels in a one-dimensional system [2]. For a double-barrier structure the time scale provided by τtr turns out to be inversely proportional to the tunneling current integrated across the resonance width.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:207:y:1994:i:1:p:452-456

DOI: 10.1016/0378-4371(94)90409-X

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