论文标题
电场引起的奇怪金属状态和氢化石墨纤维中可能的高温超导性
Electric-field induced strange metal states and possible high-temperature superconductivity in hydrogenated graphitic fibers
论文作者
论文摘要
在这项工作中，我们研究了增加施加电场强度对氢化石墨纤维的电荷转运的影响。对Na-MA范围内的直流电流进行了电阻率测量，并为1.9 K至300 K的温度进行了电阻率。温度依赖性电阻率显示了从绝缘态到金属状态以及平稳特征的线性，逐步的过渡。随着越来越多的电流的来源，纤维变得更加导电，因此电流密度上升。在高电场中观察到最有趣的功能。随着纤维的冷却，电阻率首先与温度线性降低，然后在温度t下进入高原区域？ 260？ 280 K，独立于场。这些对由碳，氢，氮和氧原子制成的系统的观察结果表明，通过研究手性在生命的起源中的作用而预测的电场诱导的超导性可能会引起高临界温度[1]。
In this work, we have studied the effects from increasing the strength of the applied electric field on the charge transport of hydrogenated graphitic fibers. Resistivity measurements were carried out for direct currents in the nA - mA range and for temperatures from 1.9 K to 300 K. The high-temperature non-ohmic voltage-current dependence is well described by the nonlinear random resistor network model applied to systems that are disordered at all scales. The temperature-dependent resistivity shows linear, step-like transitions from insulating to metallic states as well as plateau features. As more current is being sourced, the fiber becomes more conductive and thus the current density goes up. The most interesting features is observed in high electric fields. As the fiber is cooled, the resistivity first decreases linearly with the temperature and then enters a plateau region at a temperature T ? 260 ? 280 K that is field-independent. These observations on a system made out of carbon, hydrogen, nitrogen, and oxygen atoms suggest possible electric-field induced superconductivity with a high critical temperature that was predicted from studying the role of chirality on the origin of life [1].
