Time-dependent thermoelectric transport in nanosystems: reflectionless Luttinger field approach
Lozej, Črt (Author), Rejec, Tomaž (Author)

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Recently the Luttinger field approach was proposed by Eich et al. in Phys. Rev. B 90, 115116 (2014). as a way to simulate switching on a temperature gradient across a nanoscale device initially in thermal equilibrium. The time-dependent particle and heat currents can then be calculated by propagating the initial equilibrium state of the system in time. Unfortunately, applying a uniform Luttinger field in the whole of a lead causes a discrepancy between steady-state currents in the long time limit and those predicted by the Landauer-Büttiker formulas as well as artifacts at short times. Here we propose a modified approach where the Luttinger field gradually reaches its final value across a transition region. If the length of the transition region is sufficient, the electrons move through without reflecting. In this way the correct energy distribution of electrons originating from such a lead, corresponding to the new temperature, is established in the scattering region. Our approach is tested on a single quantum dot and a parallel double quantum dot system.

Keywords:thermal conductivity, thermal properties, thermoelectric effects, transport properties, quantum dots
Tipology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Number of pages:Str. 075427-1 - 075427-10
Numbering:Vol. 98, issue 7
ISSN on article:2469-9969
DOI:10.1103/PhysRevB.98.075427 This link opens in a new window
COBISS.SI-ID:95102721 This link opens in a new window
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Record is a part of a journal

Title:Physical review
Shortened title:Phys. rev. B.
Publisher:American Physical Society
COBISS.SI-ID:3042148 This link opens in a new window

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