Study of quantum point contact via low temperature scanning gate microscopy

N. Aoki, A. Burke, C. R. Da Cunha, R. Akis, D. K. Ferry, Y. Ochiai

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)79-82
Number of pages4
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - May 10 2006

ASJC Scopus subject areas

  • General Physics and Astronomy


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