resistivity of Si wafer at low T

David Goldhaber-Gordon goldhaber-gordon at
Thu May 19 00:02:16 PDT 2005

Hi David,

That wafer should conduct nicely at 300 mK (i.e. it is degenerately
doped). However, you need to be careful to make good contacts to the
wafer. A thin layer of dirt, or a Schottky barrier, may not matter at
room T but might dominate at low T.



-----Original Message-----
From: David Wang [mailto:daweiw at] 
Sent: Wednesday, May 18, 2005 5:26 PM
To: labmembers at
Subject: resistivity of Si wafer at low T


I have a degenerately doped Si wafer (P-type, Boron doped) which has a
resistivity of 0.005 Ohm-cm at room T. Does anyone know what its
resistivity will be when the temperature drops to 0.3 K. Will it behave
like an insulator or a conductor at this low T.

Thanks a lot,


More information about the labmembers mailing list