论文标题
高场和高温磁倍率揭示了多层石墨烯中堆叠断层的超导行为
High-field and high-temperature magnetoresistance reveals the superconducting behaviour of the stacking faults in multilayer graphene
论文作者
论文摘要
尽管有40年的实验研究和几项理论建议，但对多层石墨烯的磁倍率（MR）的复杂行为的总体解释，即石墨，在高场（$ b \ b \ Lessim 70〜 $ T）以及在广泛的温度范围内仍然缺乏。复杂性的一部分是由于堆叠断层（SF）的贡献，大多数厚的多层石墨烯样品都具有。我们提出了一个程序，使我们能够将SF贡献提取到我们所测量的MR 0.48〜K $ \ leq T \ leq $ 250〜K和0〜T $ \ leq B \ Lessim $ 65〜T。我们发现，SFS部分的MR行为类似于与最近出版物一致的临界温度$ t_c \ sim $ 350〜K的颗粒超导体的MR行为。测量是在多层石墨烯Tem lamella上进行的，与二维SF的边缘接触。
In spite of 40 years of experimental studies and several theoretical proposals, an overall interpretation of the complex behavior of the magnetoresistance (MR) of multilayer graphene, i.e. graphite, at high fields ($B \lesssim 70~$T) and in a broad temperature range is still lacking. Part of the complexity is due to the contribution of stacking faults (SFs), which most of thick enough multilayer graphene samples have. We propose a procedure that allows us to extract the SF contribution to the MR we have measured at 0.48~K $\leq T \leq$ 250~K and 0~T$\leq B \lesssim$ 65~T. We found that the MR behavior of part of the SFs is similar to that of granular superconductors with a superconducting critical temperature $T_c \sim $ 350~K, in agreement with recent publications. The measurements were done on a multilayer graphene TEM lamella, contacting the edges of the two-dimensional SFs.
