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Portrait of Heiner Linke; Photo: Kennet Ruona

Heiner Linke

Professor, Deputy dean at Faculty of Engineering, LTH

Portrait of Heiner Linke; Photo: Kennet Ruona

Heat flow in InAs/InP heterostructure nanowires

Author

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

Summary, in English

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.

Department/s

  • Mathematical Physics
  • Solid State Physics
  • NanoLund

Publishing year

2012

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

86

Issue

17

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics

Status

Published

Research group

  • Nanometer structure consortium (nmC)

ISBN/ISSN/Other

  • ISSN: 1098-0121