Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-03-20
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
RevTeX (pdf-LaTeX), 12 pages with 19 included jpg figures
Scientific paper
The authors apply the generalized master equation to analyze time-dependent transport through a finite quantum wire with an embedded subsystem. The parabolic quantum wire and the leads with several subbands are described by a continuous model. We use an approach originally developed for a tight-binding description selecting the relevant states for transport around the bias-window defined around the values of the chemical potential in the left and right leads in order to capture the effects of the nontrivial geometry of the system in the transport. We observe a partial current reflection as a manifestation of a quasi-bound state in an embedded well and the formation of a resonance state between an off-set potential hill and the boundary of the system.
Gainar Cosmin
Gudmundsson Vidar
Manolescu Andrei
Moldoveanu Valeriu
Tang Chi-Shung
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