Magnetoluminescence from trion and biexciton in type-II quantum dot

• Main Authors: Okuyama Rin, Eto Mikio, Hyuga Hiroyuki
• Format: Article
• Language: English
• Published: SpringerOpen 2011-01-01
• Series: Nanoscale Research Letters
• Online Access: http://www.nanoscalereslett.com/content/6/1/351

<p>Abstract</p> <p>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 <it>h</it>/2<it>e </it>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 <it>h</it>/2<it>e</it>.</p> <p>PACS: 71.35.Ji, 73.21.-b, 73.21.La, 78.67.Hc</p>