arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1602.06214cond-mat.mtrl-scicond-mat.str-el
收藏

硫修饰石墨烯的磁效应

Magnetic effects in sulfur-decorated graphene

Choongyu Hwang, Shane A. Cybart, S. J. Shin, Sooran Kim, Kyoo Kim, T. G. Rappoport, S. M. Wu, C. Jozwiak, A. V. Fedorov, S. -K. Mo, D. -H. Lee, B. I. Min, E. E.… 展开作者

Choongyu Hwang, Shane A. Cybart, S. J. Shin, Sooran Kim, Kyoo Kim, T. G. Rappoport, S. M. Wu, C. Jozwiak, A. V. Fedorov, S. -K. Mo, D. -H. Lee, B. I. Min, E. E. Haller, R. C. Dynes, A. H. Castro Neto, Alessandra Lanzara

摘要:

两种不同材料之间的相互作用可以呈现出与每种材料单独存在时观察到的物理特性完全不同的新现象。强的电子关联,如磁性和超导性,可以作为电子之间增强的库仑相互作用的结果产生。二维材料是寻找新现象的有力候选者,因为它们易于排列并相应地改变其性质。在这项工作中,我们报告的磁性效应的石墨烯,一个原型的非磁性的二维半金属,在接近硫,抗磁性绝缘体。与清洁石墨烯的明确定义的金属行为相反,随着温度降低,石墨烯/硫化合物在费米能处产生能隙。这伴随着电阻的急剧增加、高场和低场之间的磁阻斜率的符号变化以及磁滞。从低温磁有序的开始讨论了观察到的电子和磁响应的可能起源。这些结果为在石墨烯基化合物中寻找新的量子相提供了有趣的见解。

英文摘要:

The interaction between two different materials can present novel phenomena that are quite different from the physical properties observed when each material stands alone. Strong electronic correlations, such as magnetism and superconductivity, can be produced as the result of enhanced Coulomb interactions between electrons. Two-dimensional materials are powerful candidates to search for the novel phenomena because of the easiness of arranging them and modifying their properties accordingly. In this work, we report magnetic effects of graphene, a prototypical non-magnetic two-dimensional semi-metal, in the proximity with sulfur, a diamagnetic insulator. In contrast to the well-defined metallic behaviour of clean graphene, an energy gap develops at the Fermi energy for the graphene/sulfur compound with decreasing temperature. This is accompanied by a steep increase of the resistance, a sign change of the slope in the magneto-resistance between high and low fields, and magnetic hysteresis. A possible origin of the observed electronic and magnetic responses is discussed in terms of the onset of low-temperature magnetic ordering. These results provide intriguing insights on the search for novel quantum phases in graphene-based compounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑