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Título:
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Topologically protected states in ?-doped junctions with band inversion
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Autores:
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Díaz Fernández, Álvaro ;
del Valle, N. ;
Diaz, E. ;
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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Amer Physical Soc, 2018-08-20
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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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A topological boundary can be formed at the interface between a trivial and a topological insulator. The difference in the topological index across the junction leads to robust gapless surface states. Optical studies of these states are scarce in the literature, the reason being the difficulty in isolating their response from that of the bulk. In this work, we propose to deposit a ? layer of donor impurities in close proximity to a topological boundary to help in detecting gapless surface states. As we will show, gapless surface states are robust against this perturbation and they enhance intraband optical transitions as measured by the oscillator strength. These results help us to understand the interplay of surface and bulk states in topological insulators.
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En línea:
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https://eprints.ucm.es/49597/1/DiazGarciaE%2012%20LIBRE.pdf
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