Study of Quantum Point Contact via Low Temperature Scanning Gate Microscopy

Abstract

Two types of quantum point contacts have been studied by low temperature scanning gate microscopy. In addition to the usual bright spot, which corresponds to a large conductance change at the constriction, ring structures are observed near the center of the quantum point contact. The ring diameter shrinks with increasing base conductance when the side gate voltage is changed. The rings are thought to relate to the observation of impurity potentials in the constriction region.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2006
Accession Number
ADA464163

Entities

People

  • A. Burke
  • C R da Cunha
  • D. K. Ferry
  • Nobuyuki Aoki
  • R. Akis
  • Y. Ochiai

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Constrictions
  • Diameters
  • Electrical Engineering
  • Electron Gas
  • Electronics
  • Electrons
  • Energy Levels
  • Engineering
  • Impurities
  • Low Temperature
  • Magnetic Fields
  • Microscopy
  • Quantum Dots
  • Scanning
  • Semiconductors
  • Solid State Electronics
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Structural Dynamics.
  • Thin Film Deposition Science.

Technology Areas

  • Quantum Computing