Fig. 3 Electronic conductivity studies. Electronic conductivity studies. (A) The resistivity of COFBTC, pfSAC-Fe-0.2, and pure graphene at different pressures. (B) The calculated equivalent circuit as series, parallel, and series¶llel connections compared with the pfSAC-Fe-0.2. Below: Schematic structures for series, parallel, and series¶llel connections. (C) The UPS spectra in the valence band emission region for pfSAC-Fe-0.2. The work function was calculated as 4.60 eV. Peng Peng et al. Sci Adv 2019;5:eaaw2322 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).