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Experimental and density functional study of Mn doped Bi2Te3 topological insulator
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Publication details
| Journal | Materials |
|---|---|
| Date | Accepted/In press - 15 Nov 2016 |
| Date | Published (current) - 1 Dec 2016 |
| Issue number | 12 |
| Volume | 4 |
| Number of pages | 1 |
| Pages (from-to) | 126103 |
| Original language | English |
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.
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.
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.
- DFT, density functional theory, topological insulators
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