Advanced

Nonlinear thermoelectric response due to energy-dependent transport properties of a quantum dot

Svilans, Artis LU ; Burke, Adam M. LU ; Svensson, Sofia Fahlvik LU ; Leijnse, Martin LU and Linke, Heiner LU (2016) In Physica E: Low-Dimensional Systems and Nanostructures 82. p.34-38
Abstract

Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy dependence, the thermoelectric response of quantum dots is expected to be nonlinear with respect to an applied thermal bias. However, until now this effect has been challenging to observe because, first, it is experimentally difficult to apply a sufficiently large thermal bias at the nanoscale and, second, it is difficult to distinguish thermal bias effects from purely temperature-dependent effects due to overall heating of a device. Here we take advantage of a novel thermal biasing technique and demonstrate... (More)

Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy dependence, the thermoelectric response of quantum dots is expected to be nonlinear with respect to an applied thermal bias. However, until now this effect has been challenging to observe because, first, it is experimentally difficult to apply a sufficiently large thermal bias at the nanoscale and, second, it is difficult to distinguish thermal bias effects from purely temperature-dependent effects due to overall heating of a device. Here we take advantage of a novel thermal biasing technique and demonstrate a nonlinear thermoelectric response in a quantum dot which is defined in a heterostructured semiconductor nanowire. We also show that a theoretical model based on the Master equations fully explains the observed nonlinear thermoelectric response given the energy-dependent transport properties of the quantum dot.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coulomb blockade, Nanowire, Nonlinear, Thermocurrent, Thermoelectrics, Top-heating
in
Physica E: Low-Dimensional Systems and Nanostructures
volume
82
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:84976532476
  • wos:000378092400005
ISSN
1386-9477
DOI
10.1016/j.physe.2015.10.007
language
English
LU publication?
yes
id
3cbb8ebe-8a2a-44ba-ace1-6e6b34f1054a
date added to LUP
2017-02-16 10:41:25
date last changed
2017-11-19 04:37:42
@article{3cbb8ebe-8a2a-44ba-ace1-6e6b34f1054a,
  abstract     = {<p>Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy dependence, the thermoelectric response of quantum dots is expected to be nonlinear with respect to an applied thermal bias. However, until now this effect has been challenging to observe because, first, it is experimentally difficult to apply a sufficiently large thermal bias at the nanoscale and, second, it is difficult to distinguish thermal bias effects from purely temperature-dependent effects due to overall heating of a device. Here we take advantage of a novel thermal biasing technique and demonstrate a nonlinear thermoelectric response in a quantum dot which is defined in a heterostructured semiconductor nanowire. We also show that a theoretical model based on the Master equations fully explains the observed nonlinear thermoelectric response given the energy-dependent transport properties of the quantum dot.</p>},
  author       = {Svilans, Artis and Burke, Adam M. and Svensson, Sofia Fahlvik and Leijnse, Martin and Linke, Heiner},
  issn         = {1386-9477},
  keyword      = {Coulomb blockade,Nanowire,Nonlinear,Thermocurrent,Thermoelectrics,Top-heating},
  language     = {eng},
  pages        = {34--38},
  publisher    = {Elsevier},
  series       = {Physica E: Low-Dimensional Systems and Nanostructures},
  title        = {Nonlinear thermoelectric response due to energy-dependent transport properties of a quantum dot},
  url          = {http://dx.doi.org/10.1016/j.physe.2015.10.007},
  volume       = {82},
  year         = {2016},
}