Extended Data Fig. 5: Experimental electrical and optical properties of (TMTTF)2X with different anions X = SbF6, PF6, AsF6 and BF4 at room temperature.
a, σ: conductivity along x direction; μ: carrier mobility. μ is derived from σ and calculated carrier density n using μ = σ/(ne). b, optical properties with x and y polarized incident light, extracted from Supplementary Fig. 4. α: lowest absorption coefficient; EU,intra and EU,inter: Urbach energies of the two tails (lower and higher energy sides) of the absorption spectra.
