Line Plot from Scientific Research

The transport gap (dlnR/d 1/T) determined from the strain-dependent resistance (Fig. 2 c) is compared to ambient pressure (black dashed line from ref. 28 ). While biaxial compression biaxial < 0 causes a reduction of the gap size, equivalent to a vertical shift of the p = 0 data by -130 K (gray dotted), the gap increases upon tensile strain c > 0, consistent with the bandwidth-tuning in Fig. 2 b. The Mott MIT is evident from the sign change at TBR. Upon further cooling in the metallic state, (dlnR/d 1/T)to 0 as the residual resistivity is approached, followed by a sharp drop when SC sets in. Notably, the fully insulating curves exhibit a local maximum around T = 6 K associated with the VBS transition.

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