Abstract
We have measured the electrical conductivity of Ge:Ga samples prepared by neutron-transmutation doping of isotopically enriched 70Ge single crystals in order to study the metal-insulator transition (MIT) ruling out an ambiguity due to inhomogeneous distribution of impurities. The critical exponent for the zero-temperature conductivity is 0.5 in zero magnetic field and 1.1 in magnetic fields. Variable-range-hopping conduction of the insulating samples and finite-temperature scaling analysis of the MIT induced by the external magnetic field are also discussed.
Cite
CITATION STYLE
Watanabe, M. (2005). Metal-Insulator Transition in Homogeneously Doped Germanium. In Phase Transitions and Self-Organization in Electronic and Molecular Networks (pp. 291–310). Kluwer Academic Publishers. https://doi.org/10.1007/0-306-47113-2_18
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