Electronic transport time through mesoscopic devices with contact barriers
作者:
Alexander Altland,
期刊:
Annalen der Physik
(WILEY Available online 1994)
卷期:
Volume 506,
issue 1
页码: 28-39
ISSN:0003-3804
年代: 1994
DOI:10.1002/andp.19945060105
出版商: WILEY‐VCH Verlag
关键词: Mesoscopic fluctuations;Scattering theory;Nonlinear σ‐model
数据来源: WILEY
摘要:
AbstractInformation about the transport time of electrons through a quasi one‐dimensional sample is obtained by calculating the energy auto‐correlation function of the conductance. Depending on the length of the sample and its coupling to the external device (here modelled by perfectly conducting leads), the transport time undergoes a smooth crossover between two different limiting regimes. In the case of long samples and good coupling it coincides with the diffusion time. In the opposite limit of short and weakly coupled systems, however, the transport time is given by the reciprocal of the quantum mechanical decay width into the leads. The transition between both regimes is discussed in terms of a few model independent conce
点击下载:
PDF
(660KB)
返 回