2020/05/16 by Nadina Gheorghiu, Gheorghiu, Nadina, Charles R. Ebbing +3 · 1 citation
Chemistry · Computer Science · Materials Science · #Advanced Physical and Chemical Molecular Interactions #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Parallel Computing and Optimization Techniques #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2005.07885
openalex publication_date 2020/05/16 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
In this work, we have studied the effects from increasing the strength of the\napplied electric field on the charge transport of hydrogenated graphitic\nfibers. Resistivity measurements were carried out for direct currents in the nA\n- mA range and for temperatures from 1.9 K to 300 K. The high-temperature\nnon-ohmic voltage-current dependence is well described by the nonlinear random\nresistor network model applied to systems that are disordered at all scales.\nThe temperature-dependent resistivity shows linear, step-like transitions from\ninsulating to metallic states as well as plateau features. As more current is\nbeing sourced, the fiber becomes more conductive and thus the current density\ngoes up. The most interesting features is observed in high electric fields. As\nthe fiber is cooled, the resistivity first decreases linearly with the\ntemperature and then enters a plateau region at a temperature T ? 260 ? 280 K\nthat is field-independent. These observations on a system made out of carbon,\nhydrogen, nitrogen, and oxygen atoms suggest possible electric-field induced\nsuperconductivity with a high critical temperature that was predicted from\nstudying the role of chirality on the origin of life [1].\n