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 show that Mn has valency of nominally 2+. Extended x-ray absorption fine structure spectroscopy in combination with electron energy loss spectroscopy (...
| Principais autores: | , , , , , , , , , |
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| Formato: | Journal article |
| Publicado em: |
American Institute of Physics
2016
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| _version_ | 1826305462619865088 |
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| author | Ghasemi, A Kepaptsoglou, D Figueroa, A Naydenov, G Hasnip, P Probert, M Ramasse, Q van der Laan, G Hesjedal, T Lazarov, V |
| author_facet | Ghasemi, A Kepaptsoglou, D Figueroa, A Naydenov, G Hasnip, P Probert, M Ramasse, Q van der Laan, G Hesjedal, T Lazarov, V |
| author_sort | Ghasemi, A |
| collection | OXFORD |
| description | 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 scanningtransmission 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. |
| first_indexed | 2024-03-07T06:33:13Z |
| format | Journal article |
| id | oxford-uuid:f6bde7d5-c0f9-43de-8506-41c08b7e9a14 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:33:13Z |
| publishDate | 2016 |
| publisher | American Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:f6bde7d5-c0f9-43de-8506-41c08b7e9a142022-03-27T12:37:15ZExperimental and density functional study of Mn doped Bi₂Te₃ topological insulatorJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f6bde7d5-c0f9-43de-8506-41c08b7e9a14Symplectic Elements at OxfordAmerican Institute of Physics2016Ghasemi, AKepaptsoglou, DFigueroa, ANaydenov, GHasnip, PProbert, MRamasse, Qvan der Laan, GHesjedal, TLazarov, VWe 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 scanningtransmission 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. |
| spellingShingle | Ghasemi, A Kepaptsoglou, D Figueroa, A Naydenov, G Hasnip, P Probert, M Ramasse, Q van der Laan, G Hesjedal, T Lazarov, V Experimental and density functional study of Mn doped Bi₂Te₃ topological insulator |
| 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 |
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