Electron states in diluted magnetic semiconductors |
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| Institution: | 1. Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis, Tunisia;2. Laboratoire de Physique des Matériaux, Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia;1. School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People’s Republic of China;2. Basilea Pharmaceutical China Ltd, Haimen, Jiangsu 226100, People’s Republic of China;1. Cardiovascular Center, National Taiwan University Hospital Yun-Lin Branch, Dou-Liou City, Yun-Lin, Taiwan;2. Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan;3. Department of Emergency Care, National Taiwan University Hospital, Taipei, Taiwan;4. Department of Medicine, National Taiwan University Hospital, Taipei, Taiwan;1. Departamento de Física y Química, Universidad Nacional de Colombia-Sede Manizales, A.A. 127 Manizales, Colombia;2. Grupo de Magnetismo y Simulación G+, Instituto de Física, Universidad de Antioquia, A.A. 1226 Medellín, Colombia |
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| Abstract: | One of the remarkable properties of the II–VI diluted magnetic semiconductor (DMS) quantum dot (QD) is the giant Zeeman splitting of the carrier states under application of a magnetic field. This splitting reveals strong exchange interaction between the magnetic ion moment and electronic spins in the QD. A theoretical study of the electron spectrum and of its relaxation to the ground state via the emission of a longitudinal optical (LO) phonon, in a CdSe/ZnMnSe self-assembled quantum dot, is proposed in this work. Numerical calculations showed that the strength of this interaction increases as a function of the magnetic field to become more than 30 meV and allows some level crossings. We have also shown that the electron is more localized in this DMS QD and its relaxation to the ground state via the emission of one LO phonon is allowed. |
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