Exchange-bias controlled correlations in magnetically encapsulated twisted van der Waals dichalcogenides

D. Soriano, Jose Lado

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Twisted van der Waals materials have become a paradigmatic platform to realize exotic correlated states of matter. Here, we show that a twisted dichalcogenide bilayer (WSe2) encapsulated between a magnetic van der Waals material (CrBr3) features flat bands with tunable valley and spin flavors. We demonstrate that, when electron–electron interactions are included, spin-ferromagnetic and valley-ferromagnetic states emerge in the flat bands, stemming from the interplay between correlations, intrinsic spin–orbit coupling (SOC) and exchange proximity effects. We show that the specific symmetry broken state is controlled by the relative alignment of the magnetization of the encapsulation, demonstrating the emergence of correlated states controlled by exchange bias. Our results put forward a new van der Waals heterostructure where symmetry broken states emerge from a genuine interplay between twist engineering, SOC and exchange proximity, providing a powerful starting point to explore exotic collective states of matter.
Original languageEnglish
Article number474001
Number of pages8
JournalJournal of Physics D - Applied Physics
Volume53
Issue number47
DOIs
Publication statusPublished - 25 Aug 2020
MoE publication typeA1 Journal article-refereed

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