Numerical analysis of electron-wave detection by a wedge-shaped point contact

T. Usuki, M. Takatsu, Richard Kiehl, N. Yokoyama

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

To investigate useful properties caused by various interference effects of electron waves in a mesoscopic system, we carry out a numerical analysis of electron-wave propagation by a combination of several techniques for solving the two-dimensional Schrödinger equation. The techniques provide an accurate solution for a realistic potential profile in a point-contact structure, and are simple to apply even under magnetic fields. By using this calculation method, we investigate the detection of the propagation from a quantum point-contact injector to a point-contact detector under magnetic fields. We calculate electron-wave propagation and transfer conductance through a wedge-shaped detector, which has a smaller scattering cross section for injected electron waves than ordinary line-shaped detectors, and analyze the interference due to the detector as a function of detector parameters. We conclude that a well-designed wedge-shaped point contact could provide good detection of electron-wave propagation.

Original languageEnglish (US)
Pages (from-to)7615-7625
Number of pages11
JournalPhysical Review B
Volume50
Issue number11
DOIs
StatePublished - 1994
Externally publishedYes

Fingerprint

Point contacts
wedges
numerical analysis
Numerical analysis
Detectors
Electrons
detectors
Wave propagation
wave propagation
electrons
Magnetic fields
interference
injectors
magnetic fields
scattering cross sections
electric contacts
Scattering
propagation
profiles

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Numerical analysis of electron-wave detection by a wedge-shaped point contact. / Usuki, T.; Takatsu, M.; Kiehl, Richard; Yokoyama, N.

In: Physical Review B, Vol. 50, No. 11, 1994, p. 7615-7625.

Research output: Contribution to journalArticle

Usuki, T. ; Takatsu, M. ; Kiehl, Richard ; Yokoyama, N. / Numerical analysis of electron-wave detection by a wedge-shaped point contact. In: Physical Review B. 1994 ; Vol. 50, No. 11. pp. 7615-7625.
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