Metals and semiconductors at high bias

  1. Hello,

    Is there a well known theory on how metals and semiconductors should behave, electrically, while under a high voltage bias? Say, 2-3V? For example, how does the conductivity change as a function of voltage bias as we go from the low bias regime into high bias? Is there a linear dependence or is it described by a power law?

    Thank you!
  2. jcsd
  3. marcusl

    marcusl 2,149
    Science Advisor
    Gold Member

    Your question is unclear. Are you talking about devices? Which ones? What does it mean to have a "metal under bias"?
  4. Not devices, just a metal connected by source drain electrodes, for example.

    Take a 1um diameter copper wire and sweep the potential from 0V to 3V. Will the current have a linear dependence on voltage? What about a semiconductor?

    For example, theory wise, the dependence of current on temperature can be described by the Bloch Gruneisen relationship, but I was hoping for more insight on current dependence on voltage.
    Last edited: Mar 29, 2013
  5. does my question make sense?
  6. marcusl

    marcusl 2,149
    Science Advisor
    Gold Member

    Yes, but I'm not familiar enough with Bloch Gruniesen relations, etc. to answer it. I'm hoping someone else will chime in.
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