论文标题
氢化石墨的超导性
Superconductivity in Hydrogenated Graphites
论文作者
论文摘要
我们报告了用辛烷处理后已氢化的石墨材料上的运输和磁化测量。温度依赖性的电阻率显示出异常表现为重点绝缘子 - 金属转变。低于50 K,磁势数据显示磁场分别降低或增加,抗铁磁磁性和铁磁行为既有。该系统可能是一个非常规的磁性超导体。对于足够高的磁场而言,在现场冷却与零场冷却数据中观察到的不可逆行为表明,该系统可能进入低于50 K的超导状态。从非局部电气差分电导测量值获得了能隙数据。基于激子的机制可能正在将系统推向50 K以下的超导状态,在该状态下,差距有分歧。我们发现氢化碳纤维是一个多间隙系统,其临界温度估计高于室温。超导间隙的温度依赖性遵循平坦的能量关系,平坦带隙参数随温度高于50 K的温度线性增加。因此,我们发现磁场或电场可以将这种氢化的石墨系统推向50 K以下的超导状态。此外,此外,AF旋转波动创造了Pseudo Ploductuction dy Pseudo sates cante cap and pseudo sates以上50k。50K。50K。50K。
We report transport and magnetization measurements on graphitic materials that have been hydrogenated after being treated with octane. The temperature-dependent electrical resistivity shows anomalies manifested as re-entrant insulator-metal transitions. Below 50 K, the magnetoresistance data shows both antiferromagnetic and ferromagnetic behavior as the magnetic field is decrease or increased, respectively. The system is possibly an unconventional magnetic superconductor. The irreversible behavior observed in the field-cooled vs. the zero-field cooled data for a sufficiently high magnetic field suggests that the system might enter a superconducting state below 50 K. Energy gap data is obtained from nonlocal electric differential conductance measurements. An exciton-based mechanism is likely driving the system to the superconducting state below 50 K, where the gap is divergent. We find that the hydrogenated carbon fiber is a multiple gap system with critical temperatures estimates above room temperature. The temperature dependence of the superconducting gap follows the flat-band energy relationship, with the flat band gap parameter linearly increasing with the temperature above 50 K. Thus, we find that either a magnetic or an electric field can drive this hydrogenated graphitic system to superconducting state below 50 K. In addition, AF spin fluctuations creates pseudo-gap states above 50 K.