Magnetoluminescence from trion and biexciton in type-II quantum dot

Rin Okuyama, Mikio Eto, Hiroyuki Hyuga

Research output: Contribution to journalArticle

Abstract

We theoretically investigate optical Aharonov-Bohm (AB) effects on trion and biexciton in the type-II semiconductor quantum dots, in which holes are localized near the center of the dot, and electrons are confined in a ring structure formed around the dot. Many-particle states are calculated numerically by the exact diagonalization method. Two electrons in trion and biexciton are strongly correlated to each other, forming a Wigner molecule. Since the relative motion of electrons are frozen, the Wigner molecule behaves as a composite particle whose mass and charges are twice those of an electron. As a result, the period of AB oscillation for trion and biexciton becomes h/2e as a function of magnetic flux penetrating the ring. We find that the magnetoluminescence spectra from trion and biexciton change discontinuously as the magnetic flux increases by h/2e.

Original languageEnglish
Article number351
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume6
DOIs
Publication statusPublished - 2011 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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