Electron-hole complexes in individual semimagnetic quantum dots

✍ Scribed by Dorozhkin, P. S. ;Brichkin, A. S. ;Kulakovskii, V. D. ;Chernenko, A. V. ;Zaitsev, S. V. ;Ivanov, S. V. ;Toropov, A. A.

• Book ID: 105363539
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 365 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200562013

✦ Synopsis

Abstract

We compare magneto‐photoluminescence spectra of individual semimagnetic quantum dots (QDs) with different strengths of exchange interaction between a localized exciton and surrounding magnetic ions. The spectra of individual QDs with strong magnetic exchange interaction show a single line corresponding to a ground‐state exciton. In QDs with weak interaction, exciton and biexciton spectra are identified, both showing a fine structure due to electron–hole exchange interaction. The anticrossing of dark and bright exciton states in low‐symmetry QDs is demonstrated in magnetic fields in the Faraday geometry. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)