Designing flat bands by strain

By Zhen Bi, N. Yuan, Liang Fu. Physical review B, 2019

180 citations recorded by the source corpus.

Magic angle twisted bilayer graphene (MATBG) is an exciting new system for flat electronic bands and correlated physics. However, heterostrains are ubiquitous in the TBG samples, and their role on the electronic properties has not been clear. Here, the authors show that heterostrains generically broaden the flat bands in MATBG. This explains many puzzling results from transport and scanning tunneling spectroscopy experiments. Furthermore, one can utilize the heterostrain to engineer highly flexible moir\'e flat bands in bilayer transition metal dichalcogenides, suggesting another platform to be exploited.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/fcc9da9f8716ab9ab75aa16fdb8b254ea6ef059f

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In Materials Chemistry

Citations in the corpus

Theory of zero-field superconducting diode effect in twisted trilayer graphene (2021, unknown): “We refer to [46, 47] for a microscopic description of strain and nematic order in graphene moiré systems and here only use a phenomenological parameter β to describe the presence (β ̸= 0) or absence (β= 0) of strain in our analysis.”
Berry curvature dipole senses topological transition in a moiré superlattice (2022, methodology): “5 Berry curvature dipole and topological transition To investigate the topological phase-transition and associated sign reversal of Berry curvature dipole we have followed the low-energy continuum model approach of Bistritzer and MacDonald [2] for twisted bilayer graphene and extended it to TDBG (se”