Aharonov-Bohm oscillations and electron gas transitions in hexagonal core-shell nanowires with an axial magnetic field
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Otros documentos de la autoría: Royo Valls, Miguel; Segarra, Carlos; Bertoni, Andrea; Goldoni, Guido; Planelles, Josep
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
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Título
Aharonov-Bohm oscillations and electron gas transitions in hexagonal core-shell nanowires with an axial magnetic fieldFecha de publicación
2015Editor
American Physical SocietyISSN
2469-9950; 2469-9969Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.115440Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
We use spin-density-functional theory within an envelope function approach to calculate electronic states in a GaAs/InAs core-shell nanowire pierced by an axial magnetic field. Our fully three-dimensional quantum ... [+]
We use spin-density-functional theory within an envelope function approach to calculate electronic states in a GaAs/InAs core-shell nanowire pierced by an axial magnetic field. Our fully three-dimensional quantum modeling includes explicitly a description of the realistic cross section and composition of the sample, and the electrostatic field induced by external gates in two different device geometries: gate-all-around and back-gate. At low magnetic fields, we investigate Aharonov-Bohm oscillations and signatures therein of the discrete symmetry of the electronic system, and we critically analyze recent magnetoconductance observations. At high magnetic fields, we find that several charge and spin transitions occur. We discuss the origin of these transitions in terms of different localization and Coulomb regimes, and we predict their signatures in magnetoconductance experiments. [-]
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PHYSICAL REVIEW B 91, 115440 (2015)Derechos de acceso
©2015 American Physical Society
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info:eu-repo/semantics/openAccess
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info:eu-repo/semantics/openAccess
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