Observation of ν = 5/2 Fractional Quantum Hall Effect in Trilayer Graphene Proximitized by V-Doped WSe₂.

ABSTRACT: Graphene has long been a test bed for observing strongly correlated phenomena owing to its 2D nature and ability to host high carrier mobility. However, the lack of intrinsic magnetism and weak spin-orbit coupling limits its ability to host strong electronic correlations. Here, observation of strongly correlated phenomena in trilayer graphene (TLG) proximitized by a ferromagnetic V-doped WSe₂ (V-WSe₂) overlayer is reported. These include the emergence of an odd- and even-denominator fractional quantum Hall state at ν  = 5/2 and reentrant integer quantum Hall effect in the hole regime of the TLG, driven by proximate magnetism from the V-WSe₂. A remarkably large activation energy gap (Δ_5/2 = 48 ± 5 K) for the 5/2 fractional state is observed, which

SUBMITTER: Ghising P 

PROVIDER: S-EPMC12759253 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature