Magnetic-field-controlled electron dynamics in quantum cavities

Y. Takagaki, M. Elhassan, A. Shailos, C. Prasad, J. P. Bird, D. K. Ferry, K. H. Ploog, L. H. Lin, N. Aoki, Y. Ochiai

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Although soft confinement of electrons in ballistic cavities gives rise to a power law of classical probability distributions, the behavior is limited to a narrow range of the variable if the potential is not substantially smooth. The presence of a magnetic field normal to the cavity extends the power-law regime by generating a hierarchical phase space structure. The change in dynamics induced by the magnetic field is confirmed experimentally through analysis of conductance fluctuations in quantum cavities defined by electrostatic gates on a high-mobility heterojunction. Nonfractal conductance fluctuations as a function of the gate bias at zero magnetic field are transformed to be fractal when the cyclotron radius is comparable to the cavity size.

Original languageEnglish (US)
Pages (from-to)10255-10259
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
StatePublished - Oct 15 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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