Electric Field Heating of Supported and Free-Standing AuPd Fine Wires

  • C. G. Smith
  • M. N. Wybourne
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 13)


Using electron-beam lithography, fine AuPd wires of 50 nm and 30 nm thickness have been fabricated over a length of 10 μm on a Si3N4 substrate. The resistance rise as a function of temperature fits well to one-dimensional Coulomb interactions for low temperatures. On etching away the substrate the functional form of the resistance rise changes and cannot be fitted to theory. It is found that for a supported wire the energy loss is limited by the electron-phonon scattering rate which is proportional to the square of the electron temperature. For a free-standing wire the heat loss is limited by diffusion of electrons and phonons along the wire. Recently 100 nm width and 5 nm thickness have been made free standing over a length of 15 μm.


Tunnel Junction Quantum Noise Conversion Gain Josephson Current Superconducting Tunnel Junction 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • C. G. Smith
    • 1
  • M. N. Wybourne
    • 2
  1. 1.Cavendish LaboratoryCambridgeUK
  2. 2.GEC Research Ltd.Wembley, Middx.UK

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