复旦大学首次在三维空间发现量子霍尔效应

Researchers from Fudan University in Shanghai and Cornell University in the United States have found evidence of a new type of quantum Hall effect existent in nanostructures of three-dimensional topological semimetal.

上海复旦大学和美国康奈尔大学的研究人员发现，在拓扑半金属砷化铬纳米片中观测到新型的三维量子霍尔效应。

The research, published online in Nature on Monday, represents a breakthrough in the research of the quantum Hall effect, which, discovered decades ago, remains one of the most studied phenomena in condensed matter physics. Studies of the quantum Hall effect is relevant to research areas such as topological phases, strong electron correlations and quantum computing.

这项研究在线发表在周一的《自然》杂志上，是量子霍尔效应研究的一个新突破。量子霍尔效应是20世纪以来凝聚态物理领域最重要的科学发现之一，至今仍是研究热点。量子霍尔效应的研究涉及拓扑相、电子元器件和量子计算等领域。

Before the recent discovery, the quantum Hall effect was observed and investigated only in two-dimensional electron systems when subjected to low temperatures and strong magnetic fields.

在此之前，人们只能在低温和强磁场环境中观测和研究二维电子系统中的量子霍尔效应。

While there has been intense interest in exploring the quantum Hall effect in higher dimensions, conditions for relevant observation are highly demanding. It took the research team three years to develop high-quality nanostructures of topological semimetals for the experiment, said Xiu Faxian, a professor in physics from Fudan University who is the corresponding author of the research paper in Nature.

虽然人们对探索高维量子霍尔效应有着浓厚的兴趣，但对相关的观测条件要求很高。复旦大学物理学教授、《自然》杂志通讯作者修发贤表示，他们的研究团队花了三年时间，为该实验设计了高质量的拓扑半金属纳米结构。