Fig. 1: In-situ pressure-dependent absorption spectra of a single crystal C48H20.
From: Narrowing band gap chemically and physically: conductive dense hydrocarbon
a Optical absorption spectra recorded during compression from ambient pressure up to 30.3 GPa, and their corresponding Tauc plot to estimate the optical band gap energies. b Optical images of C48H20 at each pressure point where the color of the crystal changes from red, dark-red, opaque black and black. c Estimated and calculated band gap energies as a function of pressure.
