We theoretically investigate the mechanisms for the magnetic field-induced singlet-triplet transition of two electrons in vertically coupled quantum dots, as a function of the field strength and direction. Our numerical approach is based on a real-space description of single-particle states in realistic samples and exact diagonalization of carrier-carrier Coulomb interaction. The three-electron system is also discussed, and we show that the magnetic field drives non-trivial transitions in the ground and excited states. (C) 2004 Elsevier B.V. All rights reserved.
Interacting electrons in artificial molecules with magnetic field of arbitrary direction / Bellucci, D.; Troiani, Filippo; Goldoni, Guido; Molinari, Elisa. - In: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES. - ISSN 1386-9477. - STAMPA. - 26:1-4(2005), pp. 327-330. [10.1016/j.physe.2004.08.096]
Interacting electrons in artificial molecules with magnetic field of arbitrary direction
D. BELLUCCI;TROIANI, Filippo;GOLDONI, Guido;MOLINARI, Elisa
2005
Abstract
We theoretically investigate the mechanisms for the magnetic field-induced singlet-triplet transition of two electrons in vertically coupled quantum dots, as a function of the field strength and direction. Our numerical approach is based on a real-space description of single-particle states in realistic samples and exact diagonalization of carrier-carrier Coulomb interaction. The three-electron system is also discussed, and we show that the magnetic field drives non-trivial transitions in the ground and excited states. (C) 2004 Elsevier B.V. All rights reserved.File | Dimensione | Formato | |
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