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VOLUME 31 (1980) | ISSUE 12 | PAGE 753
Hall investigation of germanium surfaces cleaved in liquid helium
The conductivity as of channels produced on germanium surfaces cleaved in liquid He is distributed nonuniformly on the cleaved surface. Warming at 30 < Τ < 60 К homogenizes as. The effective mobility and concentration of free holes in the channels, which can be determined from the Hall measurements, differ from the true mobility and concentration as long as as is inhomogeneous.