Simmons Fit based on general equation ((1) Simmons, J. G. Journal of Applied Physics 1963, 34 (6), 1793–1803. https://doi.org/10.1063/1.1702682. eq 27 in intermediate voltage range) and VIBL mod (doi.org/10.3390/cryst12060767)

data has few scans inside and you can select one (chunks)