復旦大學首次在三維空間發(fā)現(xiàn)量子霍爾效應

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.

上海復旦大學和美國康奈爾大學的研究人員發(fā)現(xiàn)，在拓撲半金屬砷化鉻納米片中觀測到新型的三維量子霍爾效應。

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.

這項研究在線發(fā)表在周一的《自然》雜志上，是量子霍爾效應研究的一個新突破。量子霍爾效應是20世紀以來凝聚態(tài)物理領(lǐng)域最重要的科學發(fā)現(xiàn)之一，至今仍是研究熱點。量子霍爾效應的研究涉及拓撲相、電子元器件和量子計算等領(lǐng)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，人們只能在低溫和強磁場環(huán)境中觀測和研究二維電子系統(tǒng)中的量子霍爾效應。

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.

雖然人們對探索高維量子霍爾效應有著濃厚的興趣，但對相關(guān)的觀測條件要求很高。復旦大學物理學教授、《自然》雜志通訊作者修發(fā)賢表示，他們的研究團隊花了三年時間，為該實驗設(shè)計了高質(zhì)量的拓撲半金屬納米結(jié)構(gòu)。