Fig. 2: Stoner ferromagnetism.
From: Correlated states controlled by a tunable van Hove singularity in moiré WSe2 bilayers
a Spontaneous magnetic circular dichroism (MCD) as a function of moiré lattice filling factor \(\nu\) and out-of-plane electric field \(E\) at 1.6 K. The dashed lines (from Fig. 1c) separate the layer-hybridized and layer-polarized regions. b Magnetic-field dependence of MCD of the hot spot in (a) at representative temperatures. Clear magnetic hysteresis is observed at low temperatures. Inset: temperature dependence of the spontaneous MCD. c Same as (a) under magnetic field \(B=0.5\) T. The dashed lines are a guide to the eye of the boundary of the region with enhanced magnetic susceptibility. d Calculated electronic density of states (DOS) as a function of \(\nu\) and \(E\) showing the evolution of the van Hove singularity (vHS) with \(E\). All results are for 2.7° twisted WSe2.
