Journal
PHYSICAL REVIEW B
Volume 68, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.68.241308
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The conductivity of extremely high mobility dilute two-dimensional holes in GaAs changes linearly with temperature in the insulating side of the metal-insulator transition. Hopping conduction, characterized by an exponentially decreasing conductivity with decreasing temperature, is not observed when the conductivity is smaller than e(2)/h. We suggest that strong interactions in a regime close to the Wigner crystallization must be playing a role in the unusual transport.
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