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Título:
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Donor-bound electrons in quantum rings under magnetic fields
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Autores:
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Amado, M. ;
Lima, R. P. A. ;
Gonzalez-Santander, C. ;
Domínguez-Adame Acosta, Francisco
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2007-08
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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We theoretically study donor-bound electron states in two-dimensional quantum rings of finite width. A strong magnetic field is applied perpendicular to the plane of the quantum ring. The resulting electronic states are obtained within the effective-mass approximation. For on-center donors, the radial Hamiltonian for the envelope function is exactly diagonalized, and the corresponding energy levels for different angular momenta are studied as a function of the applied magnetic field. Confinement properties change rapidly with the external magnetic field. An abrupt change of the localization properties appears at a critical magnetic field, since the electron is mainly localized around the impurity. This transition gives rise to well-defined anticrossing of levels as a function of the magnetic field. Intraband transitions are found to carry relevant information of these confining properties of the rings.
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En línea:
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https://eprints.ucm.es/id/eprint/27362/1/Dguez-Adame39libre.pdf
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