Scanning gate imaging of transport within an InGaAs QPC

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

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

1 Scopus citations

Abstract

Quantum transport in a quantum point contact of InGaAs has been successfully visualized using a low temperature scanning gate microcopy. The images involves three kinds of features: (i) conductance fluctuations due to quantum interference, (ii) characteristic peaks corresponding to the propagating mode, (iii) a static-peak pattern observed just before the pinch-off condition. Furthermore, the fluctuations in the image reveal that the area distribution has a peak at around 2.5 × 104 nm2 and follows Gaussian unitary ensemble. It is consistent with a distribution of frequency components of the magneto conductance fluctuations of the quantum point contact.

Original languageEnglish (US)
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages715-716
Number of pages2
DOIs
StatePublished - Dec 1 2007
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: Jul 24 2006Jul 28 2006

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
CountryAustria
CityVienna
Period7/24/067/28/06

Keywords

  • Quantum interference
  • Quantum point contact
  • Scanning gate microscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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