Nonuniversal conductance quantization in quantum wires

A. Yacoby, H. L. Stormer, Ned S. Wingreen, L. N. Pfeiffer, K. W. Baldwin, K. W. West

Research output: Contribution to journalArticle

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Abstract

We have measured the transport properties of high-quality quantum wires fabricated in GaAs-AlGaAs by using cleaved edge overgrowth. The low temperature conductance is quantized as the electron density in the wire is varied. While the values of the conductance plateaus are reproducible, they deviate from multiples of the universal value of 2e2/h by as much as 25%. As the temperature or dc bias increases the conductance steps approach the universal value. Several aspects of the data can be explained qualitatively using Luttinger liquid theory although there remain major inconsistencies with such an interpretation.

Original languageEnglish (US)
Pages (from-to)4612-4615
Number of pages4
JournalPhysical review letters
Volume77
Issue number22
DOIs
StatePublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Yacoby, A., Stormer, H. L., Wingreen, N. S., Pfeiffer, L. N., Baldwin, K. W., & West, K. W. (1996). Nonuniversal conductance quantization in quantum wires. Physical review letters, 77(22), 4612-4615. https://doi.org/10.1103/PhysRevLett.77.4612