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Heat flow in InAs/InP heterostructure nanowires

Matthews, J. ; Hoffmann, E. A. ; Weber, Carsten LU ; Wacker, Andreas LU orcid and Linke, Heiner LU orcid (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
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
86
issue
17
article number
174302
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
2016-04-01 14:21:41
date last changed
2022-02-27 02:11:51
@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.}},
  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          = {{https://lup.lub.lu.se/search/files/3933357/3706274.pdf}},
  doi          = {{10.1103/PhysRevB.86.174302}},
  volume       = {{86}},
  year         = {{2012}},
}