Absence of magnetic proximity effect at the interface of Bi2Se3 and (Bi,Sb)2Te3 with EuS

We performed X-ray magnetic circular dichroism (XMCD) measurements on heterostructures comprising topological insulators (TIs) of the (Bi,Sb)2(Se,Te)3 family and the magnetic insulator EuS. XMCD measurements allow us to investigate element-selective magnetic proximity effects at the very TI/EuS inte...

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Detalles Bibliográficos
Autores: Figueroa García, Adriana Isabel|||0000-0002-8498-9383, Bonell, Frédéric|||0000-0001-7296-0404, González Cuxart, Marc|||0000-0002-9085-1225, Valvidares, Manuel|||0000-0003-4895-8114, Gargiani, Pierluigi|||0000-0002-6649-0538, van der Laan, Gerrit|||0000-0001-6852-2495, Mugarza, Aitor|||0000-0002-2698-885X, Valenzuela, Sergio O.|||0000-0002-4632-8891
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:251004
Acceso en línea:https://ddd.uab.cat/record/251004
https://dx.doi.org/urn:doi:10.1103/PhysRevLett.125.226801
Access Level:acceso abierto
Palabra clave:Detection limits
Induced magnetic moments
Induced magnetism
Magnetic insulator
Magnetic proximity
Measurements of
Systematic analysis
X-ray magnetic circular dichroism
Descripción
Sumario:We performed X-ray magnetic circular dichroism (XMCD) measurements on heterostructures comprising topological insulators (TIs) of the (Bi,Sb)2(Se,Te)3 family and the magnetic insulator EuS. XMCD measurements allow us to investigate element-selective magnetic proximity effects at the very TI/EuS interface. A systematic analysis reveals that there is neither significant induced magnetism within the TI nor an enhancement of the Eu magnetic moment at such interface. The induced magnetic moments in Bi, Sb, Te, and Se sites are lower than the estimated detection limit of the XMCD measurements of ∼10-3 μB/at.

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