Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂.

ABSTRACT: Recent experiments in magic-angle twisted bilayer graphene have revealed a wealth of novel electronic phases as a result of interaction-driven spin-valley flavour polarisation. In this work, we investigate correlated phases due to the combined effect of spin-orbit coupling-enhanced valley polarisation and the large density of states below half filling of the moiré band in twisted bilayer graphene coupled to tungsten diselenide. We observe an anomalous Hall effect, accompanied by a series of Lifshitz transitions that are highly tunable with carrier density and magnetic field. The magnetisation shows an abrupt change of sign near half-filling, confirming its orbital nature. While the Hall resistance is not quantised at zero magnetic fields-indicating a ground state with partial valley polari

SUBMITTER: Bhowmik S 

PROVIDER: S-EPMC10329678 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature