Abstract
We investigate the effect of uniaxial heterostrain on the interacting phase diagram of magic-angle twisted bilayer graphene. Using both self-consistent Hartree-Fock and density-matrix renormalization group calculations, we find that small strain values (ϵ∼0.1%-0.2%) drive a zero-temperature phase transition between the symmetry-broken "Kramers intervalley-coherent"insulator and a nematic semimetal. The critical strain lies within the range of experimentally observed strain values, and we therefore predict that strain is at least partly responsible for the sample-dependent experimental observations.
Originalsprache | Englisch |
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Aufsatznummer | 027601 |
Fachzeitschrift | Physical Review Letters |
Jahrgang | 127 |
Ausgabenummer | 2 |
DOIs | |
Publikationsstatus | Veröffentlicht - 9 Juli 2021 |
Extern publiziert | Ja |