Heat flow in InAs/InP heterostructure nanowires

J. Matthews, E. A. Hoffmann, Carsten Weber, Andreas Wacker, Heiner Linke

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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.
Original languageEnglish
Article number174302
JournalPhysical Review B (Condensed Matter and Materials Physics)
Issue number17
Publication statusPublished - 2012

Subject classification (UKÄ)

  • Condensed Matter Physics


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