Linear temperature dependence of conductivity in the apparent insulating regime of dilute two-dimensional holes in GaAs

Hwayong Noh, M. P. Lilly, D. C. Tsui, J. A. Simmons, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

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 e2/h. We suggest that strong interactions in a regime close to the Wigner crystallization must be playing a role in the unusual transport.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number24
DOIs
StatePublished - Dec 23 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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