Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator
Dirac-like surface states on surfaces of topological insulators have a chiral spin structure that suppresses backscattering and protects the coherence of these states in the presence of nonmagnetic scatterers. In contrast, magnetic scatterers should open the backscattering channel via the spin-flip...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/70508 https://orcid.org/0000-0003-2226-6443 https://orcid.org/0000-0002-7022-8313 |
| _version_ | 1826208890548649984 |
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| author | Valla, T. Pan, Z. -H. Gardner, Dillon Richard Lee, Young S. Chu, Shaoyan |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Valla, T. Pan, Z. -H. Gardner, Dillon Richard Lee, Young S. Chu, Shaoyan |
| author_sort | Valla, T. |
| collection | MIT |
| description | Dirac-like surface states on surfaces of topological insulators have a chiral spin structure that suppresses backscattering and protects the coherence of these states in the presence of nonmagnetic scatterers. In contrast, magnetic scatterers should open the backscattering channel via the spin-flip processes and degrade the state’s coherence. We present angle-resolved photoemission spectroscopy studies of the electronic structure and the scattering rates upon the adsorption of various magnetic and nonmagnetic impurities on the surface of Bi[subscript 2]Se[subscript 3], a model topological insulator. We reveal a remarkable insensitivity of the topological surface state to both nonmagnetic and magnetic impurities in the low impurity concentration regime. Scattering channels open up with the emergence of hexagonal warping in the high-doping regime, irrespective of the impurity’s magnetic moment. |
| first_indexed | 2024-09-23T14:14:15Z |
| format | Article |
| id | mit-1721.1/70508 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:14:15Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/705082022-10-01T19:58:05Z Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi2Se3 Topological Insulator Valla, T. Pan, Z. -H. Gardner, Dillon Richard Lee, Young S. Chu, Shaoyan Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Physics Lee, Young S. Gardner, Dillon Richard Lee, Young S. Chu, Shaoyan Dirac-like surface states on surfaces of topological insulators have a chiral spin structure that suppresses backscattering and protects the coherence of these states in the presence of nonmagnetic scatterers. In contrast, magnetic scatterers should open the backscattering channel via the spin-flip processes and degrade the state’s coherence. We present angle-resolved photoemission spectroscopy studies of the electronic structure and the scattering rates upon the adsorption of various magnetic and nonmagnetic impurities on the surface of Bi[subscript 2]Se[subscript 3], a model topological insulator. We reveal a remarkable insensitivity of the topological surface state to both nonmagnetic and magnetic impurities in the low impurity concentration regime. Scattering channels open up with the emergence of hexagonal warping in the high-doping regime, irrespective of the impurity’s magnetic moment. United States. Dept. of Energy. Office of Basic Energy Sciences (Contract No. DEAC02-98CH10886) United States. Dept. of Energy (Grant No. DE-FG02- 07ER46134) 2012-05-04T17:57:58Z 2012-05-04T17:57:58Z 2012-03 2011-04 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/70508 Valla, T. et al. “Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi_{2}Se_{3} Topological Insulator.” Physical Review Letters 108.11 (2012): n. pag. Web. 4 May 2012. © 2012 American Physical Society https://orcid.org/0000-0003-2226-6443 https://orcid.org/0000-0002-7022-8313 en_US http://dx.doi.org/10.1103/PhysRevLett.108.117601 Physical Review Letters 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. application/pdf American Physical Society APS |
| spellingShingle | Valla, T. Pan, Z. -H. Gardner, Dillon Richard Lee, Young S. Chu, Shaoyan Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title | Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title_full | Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title_fullStr | Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title_full_unstemmed | Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title_short | Photoemission Spectroscopy of Magnetic and Nonmagnetic Impurities on the Surface of the Bi[subscript 2]Se[subscript 3] Topological Insulator |
| title_sort | photoemission spectroscopy of magnetic and nonmagnetic impurities on the surface of the bi subscript 2 se subscript 3 topological insulator |
| url | http://hdl.handle.net/1721.1/70508 https://orcid.org/0000-0003-2226-6443 https://orcid.org/0000-0002-7022-8313 |
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