Experimental and density functional study of Mn doped Bi2Te3 topological insulator

Arsham Ghasemi; D  Kepaptsoglou; A. I. Figueroa; Genadi Antonov Naydenov; Philip James Hasnip; Matthew Ian James Probert; Q Ramasse; G van der Laan; T Hesjedal; Vlado Lazarov

doi:10.1063/1.4971354

Experimental and density functional study of Mn doped Bi2Te3 topological insulator

Arsham Ghasemi, D Kepaptsoglou, A. I. Figueroa, Genadi Antonov Naydenov, Philip James Hasnip, Matthew Ian James Probert, Q Ramasse, G van der Laan, T Hesjedal, Vlado Lazarov

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi2Te3. X-ray absorption near edge structure show 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 show 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.

Original language	English
Article number	1.4971354
Pages (from-to)	126103
Number of pages	1
Journal	Materials
Volume	4
Issue number	12
DOIs	https://doi.org/10.1063/1.4971354
Publication status	Published - 1 Dec 2016

Bibliographical note

© Author(s) 2016. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

Keywords

DFT
density functional theory
topological insulators

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10.1063/1.4971354

APLMat_2016
© Author(s) 2016. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
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Matt Probert
- matt.probertyork.acuk
- Physics - Professor
Person: Academic

Support for the UKCP Consortium
Probert, M.
EPSRC
1/01/13 → 31/12/16
Project: Research project (funded) › Research

Mn-Bi2Te3
Lazarov, V. (Creator), University of York, 19 May 2016
DOI: 10.15124/14dfd1eb-0080-4e05-80a8-c605447dcb82
Dataset

Cite this

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title = "Experimental and density functional study of Mn doped Bi2Te3 topological insulator",

abstract = "We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi2Te3. X-ray absorption near edge structure show 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 andTe 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 show 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.",

keywords = "DFT, density functional theory, topological insulators",

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doi = "10.1063/1.4971354",

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AU - Ghasemi, Arsham

AU - Kepaptsoglou, D

AU - Figueroa, A. I.

AU - Naydenov, Genadi Antonov

AU - Hasnip, Philip James

AU - Probert, Matthew Ian James

AU - Ramasse, Q

AU - van der Laan, G

AU - Hesjedal, T

AU - Lazarov, Vlado

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PY - 2016/12/1

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N2 - We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi2Te3. X-ray absorption near edge structure show 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 andTe 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 show 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.

AB - We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi2Te3. X-ray absorption near edge structure show 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 andTe 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 show 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.

KW - DFT

KW - density functional theory

KW - topological insulators

U2 - 10.1063/1.4971354

DO - 10.1063/1.4971354

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JO - Materials

JF - Materials

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ER -

Experimental and density functional study of Mn doped Bi2Te3 topological insulator

Abstract

Bibliographical note

Keywords

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Matt Probert

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Support for the UKCP Consortium

Datasets

Mn-Bi2Te3

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