Effect of deconfinement on resonant transport in quantum wires
A. Ramsak (1, 2), T. Rejec (1), and J. H. Jefferson (3) ((1) J., Stefan Institute, Ljubljana, Slovenia, (2) Faculty of Mathematics and, Physics, University of Ljubljana, Ljubljana, Slovenia, (3) DERA, Electronic, Sector, Great Malvern, England)
TL;DR
This paper investigates how deconfinement caused by finite band offsets affects resonant transport in quantum wires with constrictions, revealing size-dependent resonance linewidth broadening and limits on observable resonances at higher energies or temperatures.
Contribution
It introduces the impact of deconfinement on resonance linewidths in quantum wires, highlighting size effects and energy scale limitations for resonant transport.
Findings
Resonance linewidth increases with decreasing wire size.
Deconfinement imposes an upper energy limit for observable resonances.
Resonance effects diminish at higher temperatures or energies.
Abstract
The effect of deconfinement due to finite band offsets on transport through quantum wires with two constrictions is investigated. It is shown that the increase in resonance linewidth becomes increasingly important as the size is reduced and ultimately places an upper limit on the energy (temperature) scale for which resonances may be observed.
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