Electron-phonon coupling and longitudinal mechanical-mode cooling in a metallic nanowire

F. W. J. Hekking, Antti Niskanen, J. P. Pekola

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Abstract

We investigate electron-phonon coupling in a narrow suspended metallic wire, in which the phonon modes are restricted to one dimension but the electrons behave three-dimensionally. Explicit theoretical results related to the known bulk properties are derived. We find out that longitudinal vibration modes can be cooled by electronic tunnel refrigeration far below the bath temperature provided the mechanical quality factors of the modes are sufficiently high. The obtained results apply to feasible experimental configurations.
Original languageEnglish
Article number033401
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume77
Issue number3
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

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Keywords

  • electron phonon coupling
  • coupling
  • electron-phonon interactions
  • nanowires
  • vibrational modes

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