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https://doi.org/10.1038/s41567-021-01172-9
Title: | Tunable van Hove singularities and correlated states in twisted monolayer-bilayer graphene | Authors: | Xu, Shuigang Al Ezzi, Mohammed M Balakrishnan, Nilanthy Garcia-Ruiz, Aitor Tsim, Bonnie Mullan, Ciaran Barrier, Julien Xin, Na Piot, Benjamin A Taniguchi, Takashi Watanabe, Kenji Carvalho, Alexandra Mishchenko, Artem Geim, AK Fal'ko, Vladimir I Adam, Shaffique Neto, Antonio Helio Castro Novoselov, Kostya S Shi, Yanmeng |
Keywords: | Science & Technology Physical Sciences Physics, Multidisciplinary Physics |
Issue Date: | 18-Feb-2021 | Publisher: | NATURE RESEARCH | Citation: | Xu, Shuigang, Al Ezzi, Mohammed M, Balakrishnan, Nilanthy, Garcia-Ruiz, Aitor, Tsim, Bonnie, Mullan, Ciaran, Barrier, Julien, Xin, Na, Piot, Benjamin A, Taniguchi, Takashi, Watanabe, Kenji, Carvalho, Alexandra, Mishchenko, Artem, Geim, AK, Fal'ko, Vladimir I, Adam, Shaffique, Neto, Antonio Helio Castro, Novoselov, Kostya S, Shi, Yanmeng (2021-02-18). Tunable van Hove singularities and correlated states in twisted monolayer-bilayer graphene. NATURE PHYSICS 17 (5) : 619-+. ScholarBank@NUS Repository. https://doi.org/10.1038/s41567-021-01172-9 | Abstract: | Understanding and tuning correlated states is of great interest and importance to modern condensed-matter physics. The recent discovery of unconventional superconductivity and Mott-like insulating states in magic-angle twisted bilayer graphene presents a unique platform to study correlation phenomena, in which the Coulomb energy dominates over the quenched kinetic energy as a result of hybridized flat bands. Extending this approach to the case of twisted multilayer graphene would allow even higher control over the band structure because of the reduced symmetry of the system. Here we study electronic transport properties of twisted monolayer–bilayer graphene (a bilayer on top of monolayer graphene heterostructure). We observe the formation of van Hove singularities that are highly tunable by changing either the twist angle or external electric field and can cause strong correlation effects under optimum conditions. We provide basic theoretical interpretations of the observed electronic structure. | Source Title: | NATURE PHYSICS | URI: | https://scholarbank.nus.edu.sg/handle/10635/194295 | ISSN: | 17452473 17452481 |
DOI: | 10.1038/s41567-021-01172-9 |
Appears in Collections: | Staff Publications Elements |
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