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APS » Journals » Phys. Rev. B » Volume 77 » Issue 24
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Phys. Rev. B 77, 241302(R) (2008) [4 pages]

Coherent Aharonov-Bohm oscillations in type-II (Zn,Mn)Te/ZnSe quantum dots

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I. R. Sellers1,*, V. R. Whiteside1, A. O. Govorov2, W. C. Fan3, W-C. Chou3, I. Khan1, A. Petrou1, and B. D. McCombe1
1Department of Physics, Fronzcak Hall, University at Buffalo SUNY, Buffalo, New York 14260, USA
2Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, USA
3Department of Electrophysics, National Chiao Tung University, Hsin Chu 30010, Taiwan, Republic of China

Received 20 March 2008; published 3 June 2008

The magneto-photoluminescence of type-II (Zn,Mn)Te quantum dots is presented. As a result of the type-II band alignment, Aharonov-Bohm (AB) oscillations in the photoluminescence intensity are evident. In addition, an interesting interplay between the AB effect and the spin polarization in these diluted magnetic semiconductor quantum dots is observed. The intensity of the AB oscillations increases with both magnetic field and the degree of optical polarization, indicating that the suppression of spin fluctuations improves the coherence of the system.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.241302
DOI:
10.1103/PhysRevB.77.241302
PACS:
78.55.Et, 78.67.Hc, 85.35.Be, 71.35.Ji

*isellers@buffalo.edu

 
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