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Thermopower as a tool to investigate many-body effects in quantum systems

Kristinsdottir, Liney Halla LU ; Bengtsson, Jakob LU ; Linke, Heiner LU ; Reimann, Stephanie LU and Wacker, Andreas LU (2014) In Applied Physics Letters 105(8).
Abstract
Measuring the thermopower of a confined quantum system reveals important information about its excitation spectrum. Our simulations show how this kind of transport spectroscopy is able to extract a clear signal for the onset of Wigner localization in a nanowire segment. This demonstrates that thermopower measurements provide a tool for investigating complex many-body quantum effects, which is less intrusive than the usual charge-stability diagram as no high source-drain bias is required. While the effect is most pronounced for weak tunnel coupling and low temperatures, the excited states also significantly affect the thermopower spectrum at moderate temperature, adding distinct features to the characteristic thermopower lineshape. (C) 2014... (More)
Measuring the thermopower of a confined quantum system reveals important information about its excitation spectrum. Our simulations show how this kind of transport spectroscopy is able to extract a clear signal for the onset of Wigner localization in a nanowire segment. This demonstrates that thermopower measurements provide a tool for investigating complex many-body quantum effects, which is less intrusive than the usual charge-stability diagram as no high source-drain bias is required. While the effect is most pronounced for weak tunnel coupling and low temperatures, the excited states also significantly affect the thermopower spectrum at moderate temperature, adding distinct features to the characteristic thermopower lineshape. (C) 2014 AIP Publishing LLC. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
105
issue
8
publisher
American Institute of Physics
external identifiers
  • wos:000342753500063
  • scopus:84907377129
ISSN
0003-6951
DOI
10.1063/1.4893928
language
English
LU publication?
yes
id
292a8806-441c-47e0-b2a8-9434bb6f1446 (old id 4800360)
date added to LUP
2014-12-01 14:29:43
date last changed
2017-01-01 03:44:26
@article{292a8806-441c-47e0-b2a8-9434bb6f1446,
  abstract     = {Measuring the thermopower of a confined quantum system reveals important information about its excitation spectrum. Our simulations show how this kind of transport spectroscopy is able to extract a clear signal for the onset of Wigner localization in a nanowire segment. This demonstrates that thermopower measurements provide a tool for investigating complex many-body quantum effects, which is less intrusive than the usual charge-stability diagram as no high source-drain bias is required. While the effect is most pronounced for weak tunnel coupling and low temperatures, the excited states also significantly affect the thermopower spectrum at moderate temperature, adding distinct features to the characteristic thermopower lineshape. (C) 2014 AIP Publishing LLC.},
  articleno    = {083105},
  author       = {Kristinsdottir, Liney Halla and Bengtsson, Jakob and Linke, Heiner and Reimann, Stephanie and Wacker, Andreas},
  issn         = {0003-6951},
  language     = {eng},
  number       = {8},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Thermopower as a tool to investigate many-body effects in quantum systems},
  url          = {http://dx.doi.org/10.1063/1.4893928},
  volume       = {105},
  year         = {2014},
}