Direct imaging of electron transport within a quantum point contact

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Much attention has been given to sub-1G 0 (=2e 2/h) features in the transmission curve of a quantum point contact (e.g.: 0.5G 0, 0.7G 0). Explanations for this phenomenon have been attributed to many-body interactions such as the Kondo effect or the formation of spin polarized currents. We have used scanning gate microscopy to directly observe the local features of the transport associated with sub-1G 0 structures. Images taken with this technique reveal striking features such as weak localization induced within the constriction as well as the formation of self-consistent potentials in the QPC.

Original languageEnglish (US)
Title of host publication2005 5th IEEE Conference on Nanotechnology
Pages21-24
Number of pages4
DOIs
StatePublished - Dec 1 2005
Event2005 5th IEEE Conference on Nanotechnology - Nagoya, Japan
Duration: Jul 11 2005Jul 15 2005

Publication series

Name2005 5th IEEE Conference on Nanotechnology
Volume2

Other

Other2005 5th IEEE Conference on Nanotechnology
CountryJapan
CityNagoya
Period7/11/057/15/05

Keywords

  • Nanotechnology
  • Quantum point contacts
  • SPM
  • Scanning gate microscopy

ASJC Scopus subject areas

  • Engineering(all)

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    Da Cunha, C. R., Aoki, N., Akis, R., Ferry, D. K., & Ochiai, Y. (2005). Direct imaging of electron transport within a quantum point contact. In 2005 5th IEEE Conference on Nanotechnology (pp. 21-24). [1500640] (2005 5th IEEE Conference on Nanotechnology; Vol. 2). https://doi.org/10.1109/NANO.2005.1500640