Type-II Weyl cone transitions in driven semimetals
Periodically driven systems provide tunable platforms to realize interesting Floquet topological phases and phase transitions. In electronic systems with Weyl dispersions, the band crossings are topologically protected even in the presence of time-periodic perturbations. This robustness permits vari...
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/110284 https://orcid.org/0000-0003-2119-4441 https://orcid.org/0000-0001-7809-8157 |
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| author | Oh, Yun-Tak Han, Jung Hoon Chan, Ching-Kit Lee, Patrick A |
| author2 | Massachusetts Institute of Technology. Materials Processing Center |
| author_facet | Massachusetts Institute of Technology. Materials Processing Center Oh, Yun-Tak Han, Jung Hoon Chan, Ching-Kit Lee, Patrick A |
| author_sort | Oh, Yun-Tak |
| collection | MIT |
| description | Periodically driven systems provide tunable platforms to realize interesting Floquet topological phases and phase transitions. In electronic systems with Weyl dispersions, the band crossings are topologically protected even in the presence of time-periodic perturbations. This robustness permits various routes to shift and tilt the Weyl spectra in the momentum and energy space using circularly polarized light of sufficient intensity. We show that type-II Weyl fermions, in which the Weyl dispersions are tilted with the appearance of pocketlike Fermi surfaces, can be induced in driven Dirac semimetals and line node semimetals. Under a circularly polarized drive, both semimetal systems immediately generate Weyl node pairs whose types can be further controlled by the driving amplitude and direction. The resultant phase diagrams demonstrate experimental feasibilities. |
| first_indexed | 2024-09-23T08:55:54Z |
| format | Article |
| id | mit-1721.1/110284 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:55:54Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1102842022-09-30T12:14:48Z Type-II Weyl cone transitions in driven semimetals Oh, Yun-Tak Han, Jung Hoon Chan, Ching-Kit Lee, Patrick A Massachusetts Institute of Technology. Materials Processing Center Massachusetts Institute of Technology. Department of Physics Chan, Ching-Kit Lee, Patrick A Periodically driven systems provide tunable platforms to realize interesting Floquet topological phases and phase transitions. In electronic systems with Weyl dispersions, the band crossings are topologically protected even in the presence of time-periodic perturbations. This robustness permits various routes to shift and tilt the Weyl spectra in the momentum and energy space using circularly polarized light of sufficient intensity. We show that type-II Weyl fermions, in which the Weyl dispersions are tilted with the appearance of pocketlike Fermi surfaces, can be induced in driven Dirac semimetals and line node semimetals. Under a circularly polarized drive, both semimetal systems immediately generate Weyl node pairs whose types can be further controlled by the driving amplitude and direction. The resultant phase diagrams demonstrate experimental feasibilities. United States. Department of Energy (Grant No. DE-FG02-03-ER46076) Simons Foundation. Postdoctoral Fellowship 2017-06-26T21:34:42Z 2017-06-26T21:34:42Z 2016-09 2016-08 2016-09-07T22:00:10Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/110284 Chan, Ching-Kit et al. “Type-II Weyl Cone Transitions in Driven Semimetals.” Physical Review B 94.12 (2016): n. pag. © 2016 American Physical Society https://orcid.org/0000-0003-2119-4441 https://orcid.org/0000-0001-7809-8157 en http://dx.doi.org/10.1103/PhysRevB.94.121106 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 | Oh, Yun-Tak Han, Jung Hoon Chan, Ching-Kit Lee, Patrick A Type-II Weyl cone transitions in driven semimetals |
| title | Type-II Weyl cone transitions in driven semimetals |
| title_full | Type-II Weyl cone transitions in driven semimetals |
| title_fullStr | Type-II Weyl cone transitions in driven semimetals |
| title_full_unstemmed | Type-II Weyl cone transitions in driven semimetals |
| title_short | Type-II Weyl cone transitions in driven semimetals |
| title_sort | type ii weyl cone transitions in driven semimetals |
| url | http://hdl.handle.net/1721.1/110284 https://orcid.org/0000-0003-2119-4441 https://orcid.org/0000-0001-7809-8157 |
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