Heat flow in InAs/InP heterostructure nanowires
Matthews, J.; Hoffmann, E. A.; Weber, Carsten; Wacker, Andreas, et al. (2012). Heat flow in InAs/InP heterostructure nanowires. Physical Review B (Condensed Matter and Materials Physics), 86, (17)
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Published
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English
Authors:
Matthews, J.
;
Hoffmann, E. A.
;
Weber, Carsten
;
Wacker, Andreas
, et al.
Department:
Mathematical Physics
Solid State Physics
Nanometer structure consortium (nmC)-lup-obsolete
NanoLund: Centre for Nanoscience
Research Group:
Nanometer structure consortium (nmC)-lup-obsolete
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.
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