Is it possible to increase the conductivity of semiconductor using the mechanism of superconductor (Cooper pair)? and how?
Dear Yue Wang,
In general, conventional superconducting state appears due to strong electron-phonon coupling, while unconventional superconducting state appears due to cooper pair, or spin fluctuations. Since room temperature superconductivity is not discovered yet, you cannot apply the mechanism above ~150 K. In semiconductor, valence bands and conduction bands are separated by a certain energy. Due to this gap, electrical conductivity is low in semiconductor. To increase electrical conductivity of semiconductor by applying superconductor mechanism, you must remove this energy gap and you must induce superconducting gap, or else like it. You must induce phonons that can couple electron or cooper pair to conduct electricity efficiently. However, it may be very difficult. Hope you get your answer!
Best Regards
Enamul Haque
You can not "improve" the conductivity in a system by inducing some superconducting mechanism: superconductivity is a state of matter, the whole system must become a superconductor. Cooper pairs must form and below a certain temperature they must condense to form the superconducting state.
Dear Yue Wang,
The answer is, you can't. Superconductivity in its simplest form is a Fermi surface instability in metallic systems due to paired charge carriers. You need a metallic system to start with. The metal can be quite poor in terms of conductivity. That is not a problem. Paired charge carries can lower their energy with respect to the Fermi energy. This gives the superconducting energy gap and pair condensation energy. The nature of superconducting gap is completely different from the semiconductor energy gap. I hope this helps.
Best wishes,
Saleh
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