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Título:
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Interacting electrons in polygonal quantum dots
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Autores:
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Creffield, Charles E. ;
Háusler, Wolfgang ;
Jefferson, John H ;
Sarkar, Sarben
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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, 1999-04-15
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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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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization. The transition from a weakly correlated charge distribution for small dots to a strongly correlated ‘‘Wigner molecule’’ for large dots is studied, and the behavior at the crossover is determined. In sufficiently large dots, a recently proposed mapping to an effective charge-spin model is investigated, and is found to produce the correct ordering of the energy levels and to give a good first approximation to the size of the level spacings. We conclude that this approach is a valuable method to obtain the low-energy spectrum of few-electron quantum dots.
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En línea:
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https://eprints.ucm.es/33736/1/Creffield%20C%2029%20LIBRE.pdf
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