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Article overview
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Transient and finite size effects in transport properties of a quantum wire | | Mariano Salvay
; Aníbal Iucci
; Carlos Naón
; | | Date: |
1 Aug 2011 | | Abstract: | We study the time-dependent backscattered current produced in a quantum wire
when a local barrier is suddenly switched on. Previous investigations are
improved by taking into account the finite length of the device. We establish
two different regimes in terms of the relationship between the energy scales
associated to the voltage and the length of the system. We show how previous
results, valid for wires of infinite length, are modified by the finite size of
the system. In particular our study reveals a rich pattern of temporal steps
within which the current suffers an initial relaxation followed by temporary
revivals. By employing both analytical and numerical methods we describe
peculiar features of this structure. From this analysis one concludes that our
results render a recently proposed approach to the determination of the
Luttinger parameter K, more realistic. | | Source: | arXiv, 1108.0319 | | Services: | Forum | Review | PDF | Favorites | |
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