Topological phase transitions and quantum Hall effect in the graphene family
Monolayer staggered materials of the graphene family present intrinsic spin-orbit coupling and can be driven through several topological phase transitions using external circularly polarized lasers and static electric or magnetic fields. We show how topological features arising from photoinduced pha...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/114951 |
| _version_ | 1826199972018651136 |
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| author | Ledwith, P. Kort-Kamp, W. J. M. Dalvit, D. A. R. Ledwith, Patrick J. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Ledwith, P. Kort-Kamp, W. J. M. Dalvit, D. A. R. Ledwith, Patrick J. |
| author_sort | Ledwith, P. |
| collection | MIT |
| description | Monolayer staggered materials of the graphene family present intrinsic spin-orbit coupling and can be driven through several topological phase transitions using external circularly polarized lasers and static electric or magnetic fields. We show how topological features arising from photoinduced phase transitions and the magnetic-field-induced quantum Hall effect coexist in these materials and simultaneously impact their Hall conductivity through their corresponding charge Chern numbers. We also show that the spectral response of the longitudinal conductivity contains signatures of the various phase-transition boundaries, that the transverse conductivity encodes information about the topology of the band structure, and that both present resonant peaks which can be unequivocally associated with one of the four inequivalent Dirac cones present in these materials. This complex optoelectronic response can be probed with straightforward Faraday rotation experiments, allowing the study of the crossroads between quantum Hall physics, spintronics, and valleytronics. |
| first_indexed | 2024-09-23T11:29:02Z |
| format | Article |
| id | mit-1721.1/114951 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:29:02Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1149512022-09-27T19:52:01Z Topological phase transitions and quantum Hall effect in the graphene family Ledwith, P. Kort-Kamp, W. J. M. Dalvit, D. A. R. Ledwith, Patrick J. Massachusetts Institute of Technology. Department of Physics Ledwith, Patrick J. Monolayer staggered materials of the graphene family present intrinsic spin-orbit coupling and can be driven through several topological phase transitions using external circularly polarized lasers and static electric or magnetic fields. We show how topological features arising from photoinduced phase transitions and the magnetic-field-induced quantum Hall effect coexist in these materials and simultaneously impact their Hall conductivity through their corresponding charge Chern numbers. We also show that the spectral response of the longitudinal conductivity contains signatures of the various phase-transition boundaries, that the transverse conductivity encodes information about the topology of the band structure, and that both present resonant peaks which can be unequivocally associated with one of the four inequivalent Dirac cones present in these materials. This complex optoelectronic response can be probed with straightforward Faraday rotation experiments, allowing the study of the crossroads between quantum Hall physics, spintronics, and valleytronics. 2018-04-25T15:26:26Z 2018-04-25T15:26:26Z 2018-04 2017-12 2018-04-20T18:00:08Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/114951 Ledwith, P. et al. "Topological phase transitions and quantum Hall effect in the graphene family." Physical Review B 97, 16 (August 2018): 165426 © 2018 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.97.165426 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 | Ledwith, P. Kort-Kamp, W. J. M. Dalvit, D. A. R. Ledwith, Patrick J. Topological phase transitions and quantum Hall effect in the graphene family |
| title | Topological phase transitions and quantum Hall effect in the graphene family |
| title_full | Topological phase transitions and quantum Hall effect in the graphene family |
| title_fullStr | Topological phase transitions and quantum Hall effect in the graphene family |
| title_full_unstemmed | Topological phase transitions and quantum Hall effect in the graphene family |
| title_short | Topological phase transitions and quantum Hall effect in the graphene family |
| title_sort | topological phase transitions and quantum hall effect in the graphene family |
| url | http://hdl.handle.net/1721.1/114951 |
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