Mapping the unconventional orbital texture in topological crystalline insulators
The newly discovered topological crystalline insulators feature a complex band structure involving multiple Dirac cones [superscript 1, 2, 3, 4, 5, 6], and are potentially highly tunable by external electric field, temperature or strain. Theoretically, it has been predicted that the various Dirac co...
| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Nature Publishing Group
2015
|
| Online Access: | http://hdl.handle.net/1721.1/92908 https://orcid.org/0000-0002-8803-1017 |
| _version_ | 1826216870412288000 |
|---|---|
| author | Zeljkovic, Ilija Okada, Yoshinori Huang, Cheng-Yi Sankar, R. Walkup, Daniel Zhou, Wenwen Serbyn, Maksym Chou, Fangcheng Tsai, Wei-Feng Lin, Hsin Bansil, Arun Fu, Liang Hasan, M. Z. Madhavan, Vidya |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Zeljkovic, Ilija Okada, Yoshinori Huang, Cheng-Yi Sankar, R. Walkup, Daniel Zhou, Wenwen Serbyn, Maksym Chou, Fangcheng Tsai, Wei-Feng Lin, Hsin Bansil, Arun Fu, Liang Hasan, M. Z. Madhavan, Vidya |
| author_sort | Zeljkovic, Ilija |
| collection | MIT |
| description | The newly discovered topological crystalline insulators feature a complex band structure involving multiple Dirac cones [superscript 1, 2, 3, 4, 5, 6], and are potentially highly tunable by external electric field, temperature or strain. Theoretically, it has been predicted that the various Dirac cones, which are offset in energy and momentum, might harbour vastly different orbital character7. However, their orbital texture, which is of immense importance in determining a variety of a material’s properties [superscript 8, 9, 10] remains elusive. Here, we unveil the orbital texture of Pb[subscript 1−x]Sn[subscript x]Se, a prototypical topological crystalline insulator. By using Fourier-transform scanning tunnelling spectroscopy we measure the interference patterns produced by the scattering of surface-state electrons. We discover that the intensity and energy dependences of the Fourier transforms show distinct characteristics, which can be directly attributed to orbital effects. Our experiments reveal a complex band topology involving two Lifshitz transitions [superscript 11] and establish the orbital nature of the Dirac bands, which could provide an alternative pathway towards future quantum applications. |
| first_indexed | 2024-09-23T16:54:26Z |
| format | Article |
| id | mit-1721.1/92908 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:54:26Z |
| publishDate | 2015 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/929082022-09-29T22:18:55Z Mapping the unconventional orbital texture in topological crystalline insulators Zeljkovic, Ilija Okada, Yoshinori Huang, Cheng-Yi Sankar, R. Walkup, Daniel Zhou, Wenwen Serbyn, Maksym Chou, Fangcheng Tsai, Wei-Feng Lin, Hsin Bansil, Arun Fu, Liang Hasan, M. Z. Madhavan, Vidya Massachusetts Institute of Technology. Department of Physics Fu, Liang Serbyn, Maksym The newly discovered topological crystalline insulators feature a complex band structure involving multiple Dirac cones [superscript 1, 2, 3, 4, 5, 6], and are potentially highly tunable by external electric field, temperature or strain. Theoretically, it has been predicted that the various Dirac cones, which are offset in energy and momentum, might harbour vastly different orbital character7. However, their orbital texture, which is of immense importance in determining a variety of a material’s properties [superscript 8, 9, 10] remains elusive. Here, we unveil the orbital texture of Pb[subscript 1−x]Sn[subscript x]Se, a prototypical topological crystalline insulator. By using Fourier-transform scanning tunnelling spectroscopy we measure the interference patterns produced by the scattering of surface-state electrons. We discover that the intensity and energy dependences of the Fourier transforms show distinct characteristics, which can be directly attributed to orbital effects. Our experiments reveal a complex band topology involving two Lifshitz transitions [superscript 11] and establish the orbital nature of the Dirac bands, which could provide an alternative pathway towards future quantum applications. United States. Dept. of Energy. Division of Materials Sciences and Engineering (Award DE-SC0010526) National Science Foundation (U.S.). Division of Materials Research (1104498) 2015-01-15T19:49:49Z 2015-01-15T19:49:49Z 2014-07 2014-01 Article http://purl.org/eprint/type/JournalArticle 1745-2473 1745-2481 http://hdl.handle.net/1721.1/92908 Zeljkovic, Ilija, Yoshinori Okada, Cheng-Yi Huang, R. Sankar, Daniel Walkup, Wenwen Zhou, Maksym Serbyn, et al. “Mapping the Unconventional Orbital Texture in Topological Crystalline Insulators.” Nat Phys 10, no. 8 (July 13, 2014): 572–577. https://orcid.org/0000-0002-8803-1017 en_US http://dx.doi.org/10.1038/nphys3012 Nature Physics 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 Nature Publishing Group arXiv |
| spellingShingle | Zeljkovic, Ilija Okada, Yoshinori Huang, Cheng-Yi Sankar, R. Walkup, Daniel Zhou, Wenwen Serbyn, Maksym Chou, Fangcheng Tsai, Wei-Feng Lin, Hsin Bansil, Arun Fu, Liang Hasan, M. Z. Madhavan, Vidya Mapping the unconventional orbital texture in topological crystalline insulators |
| title | Mapping the unconventional orbital texture in topological crystalline insulators |
| title_full | Mapping the unconventional orbital texture in topological crystalline insulators |
| title_fullStr | Mapping the unconventional orbital texture in topological crystalline insulators |
| title_full_unstemmed | Mapping the unconventional orbital texture in topological crystalline insulators |
| title_short | Mapping the unconventional orbital texture in topological crystalline insulators |
| title_sort | mapping the unconventional orbital texture in topological crystalline insulators |
| url | http://hdl.handle.net/1721.1/92908 https://orcid.org/0000-0002-8803-1017 |
| work_keys_str_mv | AT zeljkovicilija mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT okadayoshinori mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT huangchengyi mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT sankarr mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT walkupdaniel mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT zhouwenwen mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT serbynmaksym mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT choufangcheng mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT tsaiweifeng mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT linhsin mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT bansilarun mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT fuliang mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT hasanmz mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators AT madhavanvidya mappingtheunconventionalorbitaltextureintopologicalcrystallineinsulators |