Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations
Twisted bilayer graphene (TBG) provides an example of a system in which the interplay of interlayer interactions and superlattice structure impacts electron transport in a variety of non-trivial ways and gives rise to a plethora of interesting effects. Understanding the mechanisms of electron sc...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
|
| Online Access: | https://hdl.handle.net/1721.1/141940 |
| _version_ | 1826191587413065728 |
|---|---|
| author | Phinney, IY Bandurin, DA Collignon, C Dmitriev, IA Taniguchi, T Watanabe, K Jarillo-Herrero, P |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Phinney, IY Bandurin, DA Collignon, C Dmitriev, IA Taniguchi, T Watanabe, K Jarillo-Herrero, P |
| author_sort | Phinney, IY |
| collection | MIT |
| description | Twisted bilayer graphene (TBG) provides an example of a system in which the
interplay of interlayer interactions and superlattice structure impacts
electron transport in a variety of non-trivial ways and gives rise to a
plethora of interesting effects. Understanding the mechanisms of electron
scattering in TBG has, however, proven challenging, raising many questions
about the origins of resistivity in this system. Here we show that TBG exhibits
high-temperature magnetooscillations originating from the scattering of charge
carriers between TBG minivalleys. The amplitude of these oscillations reveals
that interminivalley scattering is strong, and its characteristic time scale is
comparable to that of its intraminivalley counterpart. Furthermore, by
exploring the temperature dependence of these oscillations, we estimate the
electron-electron collision rate in TBG and find that it exceeds that of
monolayer graphene. Our study demonstrates the consequences of the relatively
small size of the superlattice Brillouin zone and Fermi velocity reduction on
lateral transport in TBG. |
| first_indexed | 2024-09-23T08:58:14Z |
| format | Article |
| id | mit-1721.1/141940 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:58:14Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1419402023-01-30T20:34:22Z Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations Phinney, IY Bandurin, DA Collignon, C Dmitriev, IA Taniguchi, T Watanabe, K Jarillo-Herrero, P Massachusetts Institute of Technology. Department of Physics Twisted bilayer graphene (TBG) provides an example of a system in which the interplay of interlayer interactions and superlattice structure impacts electron transport in a variety of non-trivial ways and gives rise to a plethora of interesting effects. Understanding the mechanisms of electron scattering in TBG has, however, proven challenging, raising many questions about the origins of resistivity in this system. Here we show that TBG exhibits high-temperature magnetooscillations originating from the scattering of charge carriers between TBG minivalleys. The amplitude of these oscillations reveals that interminivalley scattering is strong, and its characteristic time scale is comparable to that of its intraminivalley counterpart. Furthermore, by exploring the temperature dependence of these oscillations, we estimate the electron-electron collision rate in TBG and find that it exceeds that of monolayer graphene. Our study demonstrates the consequences of the relatively small size of the superlattice Brillouin zone and Fermi velocity reduction on lateral transport in TBG. 2022-04-19T18:10:28Z 2022-04-19T18:10:28Z 2021 2022-04-19T18:02:39Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/141940 Phinney, IY, Bandurin, DA, Collignon, C, Dmitriev, IA, Taniguchi, T et al. 2021. "Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations." Physical Review Letters, 127 (5). en 10.1103/PHYSREVLETT.127.056802 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) APS |
| spellingShingle | Phinney, IY Bandurin, DA Collignon, C Dmitriev, IA Taniguchi, T Watanabe, K Jarillo-Herrero, P Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title | Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title_full | Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title_fullStr | Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title_full_unstemmed | Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title_short | Strong Interminivalley Scattering in Twisted Bilayer Graphene Revealed by High-Temperature Magneto-Oscillations |
| title_sort | strong interminivalley scattering in twisted bilayer graphene revealed by high temperature magneto oscillations |
| url | https://hdl.handle.net/1721.1/141940 |
| work_keys_str_mv | AT phinneyiy stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT bandurinda stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT collignonc stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT dmitrievia stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT taniguchit stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT watanabek stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations AT jarilloherrerop stronginterminivalleyscatteringintwistedbilayergraphenerevealedbyhightemperaturemagnetooscillations |