Experimental and density functional study of Mn doped Bi2Te3 topological insulator
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...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-12-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4971354 |
| _version_ | 1819101908978106368 |
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| author | A. Ghasemi D. Kepaptsoglou A. I. Figueroa G. A. Naydenov P. J. Hasnip M. I. J. Probert Q. Ramasse G. van der Laan T. Hesjedal V. K. Lazarov |
| author_facet | A. Ghasemi D. Kepaptsoglou A. I. Figueroa G. A. Naydenov P. J. Hasnip M. I. J. Probert Q. Ramasse G. van der Laan T. Hesjedal V. K. Lazarov |
| author_sort | A. Ghasemi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-22T01:26:09Z |
| format | Article |
| id | doaj.art-c1ada0ff05bf4b76bbc314dbfa06ae96 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-22T01:26:09Z |
| publishDate | 2016-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-c1ada0ff05bf4b76bbc314dbfa06ae962022-12-21T18:43:36ZengAIP Publishing LLCAPL Materials2166-532X2016-12-01412126103126103-810.1063/1.4971354003612APMExperimental and density functional study of Mn doped Bi2Te3 topological insulatorA. Ghasemi0D. Kepaptsoglou1A. I. Figueroa2G. A. Naydenov3P. J. Hasnip4M. I. J. Probert5Q. Ramasse6G. van der Laan7T. Hesjedal8V. K. Lazarov9Department of Physics, University of York, York YO10 5DD, United KingdomSuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, United KingdomMagnetic Spectroscopy Group, Diamond Light Source, Didcot OX11 0DE, United KingdomDepartment of Physics, University of York, York YO10 5DD, United KingdomDepartment of Physics, University of York, York YO10 5DD, United KingdomDepartment of Physics, University of York, York YO10 5DD, United KingdomSuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, United KingdomMagnetic Spectroscopy Group, Diamond Light Source, Didcot OX11 0DE, United KingdomDepartment of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United KingdomDepartment of Physics, University of York, York YO10 5DD, United KingdomWe 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.http://dx.doi.org/10.1063/1.4971354 |
| spellingShingle | A. Ghasemi D. Kepaptsoglou A. I. Figueroa G. A. Naydenov P. J. Hasnip M. I. J. Probert Q. Ramasse G. van der Laan T. Hesjedal V. K. Lazarov Experimental and density functional study of Mn doped Bi2Te3 topological insulator APL Materials |
| title | Experimental and density functional study of Mn doped Bi2Te3 topological insulator |
| title_full | Experimental and density functional study of Mn doped Bi2Te3 topological insulator |
| title_fullStr | Experimental and density functional study of Mn doped Bi2Te3 topological insulator |
| title_full_unstemmed | Experimental and density functional study of Mn doped Bi2Te3 topological insulator |
| title_short | Experimental and density functional study of Mn doped Bi2Te3 topological insulator |
| title_sort | experimental and density functional study of mn doped bi2te3 topological insulator |
| url | http://dx.doi.org/10.1063/1.4971354 |
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