Quantum and semiclassical study of magnetic quantum dots

Bence Kocsis, Gergely Palla, József Cserti

Research output: Article

12 Citations (Scopus)

Abstract

We study the energy level structure of two-dimensional charged particles in a circular quantum dot in inhomogeneous magnetic fields. In this system, the magnetic field is zero inside the dot and constant outside. Such a device can be fabricated with present-day technology. We present detailed semiclassical studies of such magnetic quantum dot systems and provide a comparison with exact quantum calculations. In the semiclassical approach we apply the Berry-Tabor formula for the density of states and the Borh-Sommerfeld quantization rules. In both cases we found good agreement with the exact spectrum in the weak magnetic field limit. The energy spectrum for a given missing flux quantum is classified in six possible classes of orbits and summarized in a so-called phase diagram. We also investigate the current flow patterns of different quantum states and show a clear correspondence with classical trajectories.

Original languageEnglish
Article number075331
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number7
DOIs
Publication statusPublished - febr. 1 2005

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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