Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators
We combine low energy muon spin rotation (LE-μSR) and soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) to study the magnetic and electronic properties of magnetically doped topological insulators, (Bi,Sb)[subscript 2]Te[subscript 3]. We find that one achieves a full magnetic volume fr...
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/117039 https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 |
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| author | Krieger, J. A. Husanu, M.-A. Sostina, D. Ernst, A. Otrokov, M. M. Prokscha, T. Schmitt, T. Suter, A. Vergniory, M. G. Chulkov, E. V. Strocov, V. N. Salman, Z. Chang, Cui-zu Moodera, Jagadeesh |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Krieger, J. A. Husanu, M.-A. Sostina, D. Ernst, A. Otrokov, M. M. Prokscha, T. Schmitt, T. Suter, A. Vergniory, M. G. Chulkov, E. V. Strocov, V. N. Salman, Z. Chang, Cui-zu Moodera, Jagadeesh |
| author_sort | Krieger, J. A. |
| collection | MIT |
| description | We combine low energy muon spin rotation (LE-μSR) and soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) to study the magnetic and electronic properties of magnetically doped topological insulators, (Bi,Sb)[subscript 2]Te[subscript 3]. We find that one achieves a full magnetic volume fraction in samples of (V/Cr)[subscript x](Bi,Sb)[subscript 2−x]Te[subscript 3] at doping levels x≳0.16. The observed magnetic transition is not sharp in temperature indicating a gradual magnetic ordering. We find that the evolution of magnetic ordering is consistent with formation of ferromagnetic islands which increase in number and/or volume with decreasing temperature. Resonant ARPES at the V L[subscript 3] edge reveals a nondispersing impurity band close to the Fermi level as well as V weight integrated into the host band structure. Calculations within the coherent potential approximation of the V contribution to the spectral function confirm that this impurity band is caused by V in substitutional sites. The implications of our results on the observation of the quantum anomalous Hall effect at mK temperatures are discussed. |
| first_indexed | 2024-09-23T09:49:00Z |
| format | Article |
| id | mit-1721.1/117039 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:49:00Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1170392022-09-30T17:01:19Z Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators Krieger, J. A. Husanu, M.-A. Sostina, D. Ernst, A. Otrokov, M. M. Prokscha, T. Schmitt, T. Suter, A. Vergniory, M. G. Chulkov, E. V. Strocov, V. N. Salman, Z. Chang, Cui-zu Moodera, Jagadeesh Massachusetts Institute of Technology. Department of Physics Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Chang, Cui-zu Moodera, Jagadeesh We combine low energy muon spin rotation (LE-μSR) and soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) to study the magnetic and electronic properties of magnetically doped topological insulators, (Bi,Sb)[subscript 2]Te[subscript 3]. We find that one achieves a full magnetic volume fraction in samples of (V/Cr)[subscript x](Bi,Sb)[subscript 2−x]Te[subscript 3] at doping levels x≳0.16. The observed magnetic transition is not sharp in temperature indicating a gradual magnetic ordering. We find that the evolution of magnetic ordering is consistent with formation of ferromagnetic islands which increase in number and/or volume with decreasing temperature. Resonant ARPES at the V L[subscript 3] edge reveals a nondispersing impurity band close to the Fermi level as well as V weight integrated into the host band structure. Calculations within the coherent potential approximation of the V contribution to the spectral function confirm that this impurity band is caused by V in substitutional sites. The implications of our results on the observation of the quantum anomalous Hall effect at mK temperatures are discussed. National Science Foundation (U.S.) (STC Center for Integrated Quantum Materials. Grant DMR-1231319) National Science Foundation (U.S.) (Grant DMR-1207469) National Science Foundation (U.S.) (Grant DMR1700137) United States. Office of Naval Research (N00014-13-1-0301) United States. Office of Naval Research (N00014-16-1-2657) 2018-07-20T19:48:01Z 2018-07-20T19:48:01Z 2017-11 2017-08 2017-11-14T22:43:37Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/117039 Krieger, J. A., et al. “Spectroscopic Perspective on the Interplay between Electronic and Magnetic Properties of Magnetically Doped Topological Insulators.” Physical Review B, vol. 96, no. 18, Nov. 2017. © 2017 American Physical Society https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 en http://dx.doi.org/10.1103/PhysRevB.96.184402 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Krieger, J. A. Husanu, M.-A. Sostina, D. Ernst, A. Otrokov, M. M. Prokscha, T. Schmitt, T. Suter, A. Vergniory, M. G. Chulkov, E. V. Strocov, V. N. Salman, Z. Chang, Cui-zu Moodera, Jagadeesh Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title | Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title_full | Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title_fullStr | Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title_full_unstemmed | Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title_short | Spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| title_sort | spectroscopic perspective on the interplay between electronic and magnetic properties of magnetically doped topological insulators |
| url | http://hdl.handle.net/1721.1/117039 https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 |
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