Imaging of quantum interference patterns within a quantum point contact

Carlo R. Da Cunha, Nobuyuki Aoki, Takahiro Morimoto, Yuichi Ochiai, Richard Akis, David K. Ferry

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Abstract

Visualization of quantum interference patterns has been obtained within a quantum point contact using scanning gate microscopy. The area distribution of the interference pattern is shown to be consistent with the interference area obtained from the magnetoconductance fluctuations of a quantum point contact. Both distributions follow the Gaussian unitary ensemble, corresponding to chaotic behavior. The interference is caused by the random potential fluctuations within the channel, which is modified by the tip-induced potential.

Original languageEnglish (US)
Article number242109
JournalApplied Physics Letters
Volume89
Issue number24
DOIs
StatePublished - Dec 29 2006

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Da Cunha, C. R., Aoki, N., Morimoto, T., Ochiai, Y., Akis, R., & Ferry, D. K. (2006). Imaging of quantum interference patterns within a quantum point contact. Applied Physics Letters, 89(24), [242109]. https://doi.org/10.1063/1.2405843