Zero Field Magnetoresistance Peaks in Open Quantum Dots: Weak Localization or a Fundamental Property?

Richard Akis, Dragica Vasileska, David K. Ferry, Jonathan P. Bird

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

We have performed numerical simulations of the magnetotransport of open quantum dots with contacts supporting several modes. We reproduce the zero field resistance peaks seen in experiments performed on such structures, a phenomenon previously attributed to weak localization. Our results, however, indicate that these peaks can have an entirely different origin, involving the zero field crossings of conductance resonance lines that reflect the underlying dot spectrum. Even with significant ensemble averaging. the nature of these crossings largely determines the shape and width of the resistance peaks.

Original languageEnglish (US)
Pages (from-to)328-331
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume38
Issue number1 B
DOIs
StatePublished - Jan 1 1999
EventProceedings of the 1998 International Symposium on Formation, Physics and Device Application of Quantum Dot Structures, QDS-98 - Sapporo, Japan
Duration: May 31 1998Jun 4 1998

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Keywords

  • Magnetotransport
  • Numerical simulation
  • Poisson equation
  • Quantum dots
  • Weak localization

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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