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Heat flow in InAs/InP heterostructure nanowires

Matthews, J.; Hoffmann, E. A.; Weber, Carsten LU ; Wacker, Andreas LU and Linke, Heiner LU (2012) In Physical Review B (Condensed Matter and Materials Physics) 86(17).
Abstract
The transfer of heat between electrons and phonons plays a key role for thermalmanagement in future nanowire-based devices, but only a few experimental measurements of electron-phonon (e-ph) coupling in nanowires are available. Here, we combine experimental temperature measurements on an InAs/InP heterostructure nanowire system with finite element modeling to extract information on heat flow mediated by e-ph coupling. We find that the electron and phonon temperatures in our system are highly coupled even at temperatures as low as 2 K. Additionally, we find evidence that the usual power-law temperature dependence of electron-phonon coupling may not correctly describe the coupling in nanowires and show that this result is consistent with... (More)
The transfer of heat between electrons and phonons plays a key role for thermalmanagement in future nanowire-based devices, but only a few experimental measurements of electron-phonon (e-ph) coupling in nanowires are available. Here, we combine experimental temperature measurements on an InAs/InP heterostructure nanowire system with finite element modeling to extract information on heat flow mediated by e-ph coupling. We find that the electron and phonon temperatures in our system are highly coupled even at temperatures as low as 2 K. Additionally, we find evidence that the usual power-law temperature dependence of electron-phonon coupling may not correctly describe the coupling in nanowires and show that this result is consistent with previous research on similar one-dimensional electron systems. We also compare the strength of the observed e-ph coupling to a theoretical analysis of e-ph interaction in InAs nanowires, which predicts a significantly weaker coupling strength than observed experimentally. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
86
issue
17
publisher
American Physical Society
external identifiers
  • wos:000310968400003
  • scopus:84870002149
ISSN
1098-0121
DOI
10.1103/PhysRevB.86.174302
language
English
LU publication?
yes
id
4dee4f8d-fda2-4831-9315-a957bf92371a (old id 3243987)
date added to LUP
2012-12-28 10:12:46
date last changed
2017-04-23 04:00:39
@article{4dee4f8d-fda2-4831-9315-a957bf92371a,
  abstract     = {The transfer of heat between electrons and phonons plays a key role for thermalmanagement in future nanowire-based devices, but only a few experimental measurements of electron-phonon (e-ph) coupling in nanowires are available. Here, we combine experimental temperature measurements on an InAs/InP heterostructure nanowire system with finite element modeling to extract information on heat flow mediated by e-ph coupling. We find that the electron and phonon temperatures in our system are highly coupled even at temperatures as low as 2 K. Additionally, we find evidence that the usual power-law temperature dependence of electron-phonon coupling may not correctly describe the coupling in nanowires and show that this result is consistent with previous research on similar one-dimensional electron systems. We also compare the strength of the observed e-ph coupling to a theoretical analysis of e-ph interaction in InAs nanowires, which predicts a significantly weaker coupling strength than observed experimentally.},
  articleno    = {174302},
  author       = {Matthews, J. and Hoffmann, E. A. and Weber, Carsten and Wacker, Andreas and Linke, Heiner},
  issn         = {1098-0121},
  language     = {eng},
  number       = {17},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Heat flow in InAs/InP heterostructure nanowires},
  url          = {http://dx.doi.org/10.1103/PhysRevB.86.174302},
  volume       = {86},
  year         = {2012},
}