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As the Fermi level moves toward the conduction band in an n-type semiconductor; when heavily doped, it moves into the conduction band of the semi conductor. So, will the semi conductor behave as a conductor at that point and if so, will it be a superconductor?

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  • $\begingroup$ Highly doped semi-conductor behaves as a conductor. Whether it is a superconductor or not is different question. $\endgroup$ – David Saykin Oct 6 '18 at 20:34
  • $\begingroup$ @DavidSaykin yeah, but at Absolute zero, conductors are superconductors, so will a semiconductor also behave as such? $\endgroup$ – Harshdeep Singh Oct 6 '18 at 20:36
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    $\begingroup$ at absolute zero some metals (conductors, semi-conductors and insulators) are superconductors and some are not. For example, Al is superconductor and Cu is not. $\endgroup$ – David Saykin Oct 6 '18 at 20:50
  • $\begingroup$ When degenerately doped the dopant levels may merge with the conduction band. Otherwise, at T=0 the Fermi level is never in the conduction band. $\endgroup$ – Jon Custer Oct 6 '18 at 22:14

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