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Optically Detected Spin and Orbit Resonance of Semiconductor Quantum Dots

✍ Scribed by E. Lifshitz; A. Glozman

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 84 KB
Volume: 224
Category: Article
ISSN: 0370-1972
DOI: 10.1002/1521-3951(200103)224:2<541::aid-pssb541>3.0.co;2-z

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✦ Synopsis

The luminescence spectrum of CdSe/CdS core-shell nanocrystals contains a dominant exciton band located at the CdSe core and an additional weak non-excitonic band, associated with trapped carriers. The present paper describes our efforts to identify the influence of CdSe/CdS interfaces on the localization of photogenerated species, utilizing optically detected magnetic spin and spinorbit resonance spectroscopy (ODMR). The spin resonance (SR) spectrum showed two resonance signals: the first associated with a trapped hole in a symmetric site within the core, and a second, corresponding to trapped electrons in an anisotropic interface defect site. The spin-orbit resonance (SOR) signal data are presented.

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