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Metal-Semiconductor-Metal Junction

  1. Jun 28, 2013 #1
    Hello everyone,

    Here i have metal-semiconductor-metal (M-S-M) junctions, p-type semiconductor
    separating two similar metals.
    In above picture semiconductor forming schottky barriers with metals, While
    in below picture these are ohmic contacts..
    If assume that the semiconductor is very thin(few nanometers) and proper biasing
    is applied,
    Then is it possible for the electrons to tunnel directly from metal to metal..??
    Or is there any indirect tunneling paths.?

    Any answers would be greatly appreciated!
  2. jcsd
  3. Jul 3, 2013 #2
    Out of curiosity is this something you're working on as a personal project?
  4. Jul 6, 2013 #3
    If the semiconductor is thin enough then absolutely you can get a significant tunneling path. Is the idea to bias the p-type semicondutor to modulate its depletion width and create a switch?
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