Fig. 2: Diffusive spin transport in a doped WSe2/WS2 moiré superlattice.
From: Spin transport of a doped Mott insulator in moiré heterostructures
a The spatial-temporal evolution of a spin excitation in the WSe2/WS2 heterostructure at various hole concentrations, labeled in units of \(p/{p}_{0}\). The horizontal and vertical axes represent the temporal and spatial separation between the pump and probe pulses, respectively. The color represents the circular dichroic signal on a log scale. b, c Horizontal cuts from a (dots) and fits the diffusion-decay model (lines) for \(p/{p}_{0}\) = 0.5 (b) and \(p/{p}_{0}\) = 1 (c). The spin transport is well described by a diffusion-decay model for all hole concentrations. d Extracted spin diffusion constant at various initial hole concentrations in the moiré superlattice. Error bars represent 95% confidence intervals obtained when fitting the data to a diffusion-decay model.
