Cr2Te3 Thin Films for Integration in Magnetic Topological Insulator Heterostructures
Burn, David M. (Diamond Light Source)
Duffy, L. B. (University of Oxford. Department of Physics)
Fujita, R. (University of Oxford. Department of Physics)
Zhang, S. L. (University of Oxford. Department of Physics)
Figueroa García, Adriana Isabel (Institut Català de Nanociència i Nanotecnologia)
Herrero-Martín, Javier (ALBA Laboratori de Llum de Sincrotró)
van der Laan, Gerrit (Diamond Light Source)
Hesjedal, Thorsten (University of Oxford. Department of Physics)

Date:	2019
Abstract:	Chromium telluride compounds are promising ferromagnets for proximity coupling to magnetic topological insulators (MTIs) of the Cr-doped (Bi,Sb)(Se,Te) class of materials as they share the same elements, thus simplifying thin film growth, as well as due to their compatible crystal structure. Recently, it has been demonstrated that high quality (001)-oriented CrTe thin films with perpendicular magnetic anisotropy can be grown on c-plane sapphire substrate. Here, we present a magnetic and soft x-ray absorption spectroscopy study of the chemical and magnetic properties of CrTe thin films. X-ray magnetic circular dichroism (XMCD) measured at the Cr L edges gives information about the local electronic and magnetic structure of the Cr ions. We further demonstrate the overgrowth of CrTe (001) thin films by high-quality Cr-doped SbTe films. The magnetic properties of the layers have been characterized and our results provide a starting point for refining the physical models of the complex magnetic ordering in CrTe thin films, and their integration into advanced MTI heterostructures for quantum device applications.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Ferromagnetism ; Topological insulators
Published in:	Scientific reports, Vol. 9 (July 2019) , art. 10793, ISSN 2045-2322

DOI: 10.1038/s41598-019-47265-7
PMID: 31346229

10 p, 1.5 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > The ALBA Synchrotron
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Articles > Published articles