Transport in cleaved-edge overgrowth wires

R. De Picciotto, H. L. Stormer, A. Yacoby, L. N. Pfeiffer, K. W. Baldwin, K. W. West

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We report the results of 3 terminal measurements on a one-dimensional (1D) wire. By utilizing cleaved-edge overgrowth, we were able to vary the coupling between a 1D conductor and an adjacent two-dimensional electron gas (2DEG) strip attached to the central part of the wire. We study the 1D-2DEG coupling by controlling the width of the 2DEG strip. Ballistic transport along the wire persists for interaction regions as long as 6 μm. Thus, with our shortest interaction region (narrowest strip) of 2 μm, the wire remains almost undisturbed by the presence of the nearby 2DEG allowing a true 3 terminal measurement on a clean wire. Our observations also explain the origin of the non-universal conductance quantization of such 1D wires.

Original languageEnglish (US)
Pages (from-to)17-21
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1
StatePublished - Jan 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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