Time-dependent thermoelectric transport in nanosystems: reflectionless Luttinger field approach
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.
thermal conductivity
thermal properties
thermoelectric effects
transport properties
quantum dots
true
false
false
Angleški jezik
Angleški jezik
Neznano
2018-09-07 11:54:17
2018-09-07 11:54:19
2021-04-20 12:56:24
0000-00-00 00:00:00
2018
0
0
Str. 075427-1 - 075427-10
issue 7
Vol. 98
2018
0000-00-00
NiDoloceno
NiDoloceno
NiDoloceno
530.145
2469-9969
10.1103/PhysRevB.98.075427
95102721
3042148
RAZ_Lozej_Crt_i2018.pdf
RAZ_Lozej_Crt_i2018.pdf
1
3D907D9453F1D5714A547634D510EE1B
0210e3b5638d122f357de78795a4e8ff7224e159bdaf8a41fe5409745387a753
9c306944-a1b5-11eb-a523-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=113107
Fakulteta za matematiko in fiziko