Conductance quantization and zero bias peak in a gated quantum wire

R. W. Giannetta, T. A. Olheiser, M. Hannan, I. Adesida, M. R. Melloch

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Conductance measurements are reported for an 0.4 μm wide GaAs/AlGaAs quantum wire with 7 cross-channel gates. The device exhibited integral conductance steps, magnetoconductance plateaus in agreement with the multiprobe formula and a conductance feature at 0.65(2e 2/h). Differential conductance measurements down to 50 mK revealed a zero bias conductance peak that vanished with an in-plane field of 1 T. The width of this peak was comparable to that reported in high mobility quantum point contacts (Phys. Rev. Lett. 88 (2002) 226805). At low conductances this device also exhibited single electron charging characteristic of a multiple quantum dot.

Original languageEnglish
Pages (from-to)270-277
Number of pages8
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume27
Issue number1-2
DOIs
Publication statusPublished - Mar 2005

Keywords

  • Conductance quantization
  • Coulomb blockade
  • Kondo
  • Mesoscopic
  • Multiprobe
  • Zero bias peak

ASJC Scopus subject areas

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

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