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近年来对半金属铋(Bi)是否具有拓扑绝缘体性质存在争论,一直缺乏直接的电输运证据。中国科学院强磁场科学中心田明亮研究员课题组在相关研究方面开展了深入的研究,相关研究成果近期发表在Nature出版集团旗下的《科学报道》(Scientific Reports)上。在前期的研究中,课题组通过强磁场下的量子输运行为测量,首次给出了超薄Bi纳米带中存在二维金属表面态的直接证据,同时发现该金属表面态有可能是拓扑保护的。最近,课题组副研究员宁伟等通过对表面
In recent years, there is a debate about whether semiconducting bismuth (Bi) has the properties of topological insulator. There has been no direct evidence of electrical transport. Tian Mingliang, a researcher at the Strong Magnetic Field Science Center of the Chinese Academy of Sciences, conducted an in-depth research on the related research. The research results recently published in the Scientific Reports by Nature Publishing Group. In the previous research, the group through the strong magnetic field quantum transport behavior measurement, for the first time gives the ultrathin Bi nanobelts exist direct evidence of two-dimensional metal surface state, also found that the metal surface state may be topological protection of. Recently, the research group associate researcher Ning Wei passed on the surface