Ghasemi, A, Kepaptsoglou, D, Figueroa, AI et al. (7 more authors) (2016) Experimental and density functional study of Mn doped Bi 2 Te 3 topological insulator. APL Materials, 4 (12). 126103. ISSN 2166-532X
Abstract
We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi₂Te₃ X-ray absorption near edge structure shows that Mn has valency of nominally 2+. Extended x-ray absorption fine structure spectroscopy in combination with electron energy loss spectroscopy (EELS) shows that Mn is a substitutional dopant of Bi and Te and also resides in the van der Waals gap between the quintuple layers of Bi₂Te₃. Combination of aberration-corrected scanning transmission electron microscopy and EELS shows that Mn substitution of Te occurs in film regions with increased Mn concentration. First-principles calculations show that the Mn dopants favor octahedral sites and are ferromagnetically coupled.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Materials; Ferromagnetism; Spectroscopy; Condensed matter properties; Doping; Crystallography; Materials properties; Magnetism; X-ray spectroscopy; Chemical analysis |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Apr 2018 15:36 |
Last Modified: | 11 Feb 2019 16:55 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.4971354 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129333 |