Complex spin texture in the pure and Mn-doped topological insulator Bi2Te3

Topological insulators are characterized by the presence of spin-momentum-locked surface states with Dirac points that span the fundamental bulk band gap. We show by first-principles calculations that the surface state of the insulator Bi 2Te 3 survives upon moderate Mn doping of the surface layers....

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Detalles Bibliográficos
Autores: Henk, J., Ernst, Arthur, Eremeev, Sergey V., Chulkov, Eugene V., Maznichenko, I. V., Mertig, I.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/102062
Acceso en línea:http://hdl.handle.net/10261/102062
Access Level:acceso abierto
Descripción
Sumario:Topological insulators are characterized by the presence of spin-momentum-locked surface states with Dirac points that span the fundamental bulk band gap. We show by first-principles calculations that the surface state of the insulator Bi 2Te 3 survives upon moderate Mn doping of the surface layers. The spin texture of both undoped and Mn-doped Bi2Te 3 is much more complicated than commonly believed, showing layer-dependent spin reversal and spin vortices. © 2012 American Physical Society.

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