Nano Research

, Volume 4, Issue 3, pp 259–265 | Cite as

Hot-electron effects in InAs nanowire Josephson junctions

  • Stefano Roddaro
  • Andrea Pescaglini
  • Daniele Ercolani
  • Lucia Sorba
  • Francesco Giazotto
  • Fabio Beltram
Research Article


The controlled tailoring of the energy distribution in an electron system opens the way to interesting new physics and device concepts, as demonstrated by research on metallic nanodevices during recent years. Here we investigate how Josephson coupling in a superconductor-InAs nanowire junction can be tuned by means of hot-electron injection and we show that a complete suppression of superconductive effects can be achieved using a power as low as 100 pW. Nanowires offer a novel design freedom as they allow axial and radial heterostructures to be defined as well as control over doping profiles, which can be crucial in the development of devices—such as nanorefrigerators—where precisely controlled and predictable energy barriers are mandatory. Our work provides estimates for unknown key thermal and electrical parameters, such as the electron-phonon coupling, in our InAs nanostructures.


Nanowire hot-electron Josephson effect InAs heat conduction 


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Supplementary material

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Stefano Roddaro
    • 1
  • Andrea Pescaglini
    • 1
  • Daniele Ercolani
    • 1
  • Lucia Sorba
    • 1
  • Francesco Giazotto
    • 1
  • Fabio Beltram
    • 1
    • 2
  1. 1.NESTIstituto Nanoscienze-CNR and Scuola Normale SuperiorePisaItaly
  2. 2.IIT@NESTCenter for Nanotechnology InnovationPisaItaly

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