Accession Number:

ADA464163

Title:

Study of Quantum Point Contact via Low Temperature Scanning Gate Microscopy

Descriptive Note:

Journal article

Corporate Author:

ARIZONA STATE UNIV TEMPE DEPT OF ELECTRICAL ENGINEERING

Report Date:

2006-01-01

Pagination or Media Count:

5.0

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.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE