Fig. 4: Experimental evidence for the correlated gap at the Fermi level.
From: Ferromagnetism and correlated insulating states in monolayer Mo33Te56
a High-resolution dI/dV spectra recorded at the TDE/U and centre sites at T = 0.35 K, showing a relatively uniform hard energy gap. Δ0 denotes the size of the zero-conductance region (Supplementary Fig. 18). b Temperature-dependent dI/dV spectra (centre site) from 0.35 K – 77 K, plotted on a logarithmic scale. c Selective spectra taken at 0.35 K (black curve) and 20 K (grey curve). The red curve is a thermal broadening simulation (T = 20 K) of the 0.35 K spectrum. d Experimental ΔΝ (black spots) at different sample temperatures. The grey line is a visual guide, and the red line represents the simulated ΔΝ (T) from thermal broadening of the experimental 0.35 K spectrum (Supplementary Note 3). ΔN is the gap defined by the midpoints of the edge slopes, i.e., the maximum point in the |d2I/dV2| spectra in (c). Stabilization parameters: Vbias = 100 mV, It = 200 pA, and Vmod = 2 mV.
