Publication

Article Metrics

Citations


Online attention

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

DOI: 10.1103/PhysRevLett.125.226801 DOI Help

Authors: A. I. Figueroa (Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST) , F. Bonell (Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST) , M. G. Cuxart (Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST; Universitat Autònoma de Barcelona (UAB)) , M. Valvidares (ALBA Synchrotron Light Source) , P. Gargiani (0000-0003-4895-8114) , G. Van Der Laan (Diamond Light Source) , A. Mugarza (Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST; Institució Catalana de Recerca i Estudis Avançats (ICREA)) , S. O. Valenzuela (Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST; Institució Catalana de Recerca i Estudis Avançats (ICREA))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 125 , PAGES 226801

State: Published (Approved)
Published: November 2020

Abstract: 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.

Journal Keywords: XMCD; topological insulators; quantum anomalous Hall effect

Subject Areas: Physics, Materials, Information and Communication Technology

Facility: ALBA

Discipline Tags:



Technical Tags: