4.8 Article

Moire pattern of interference dislocations in condensate of indirect excitons

期刊

NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -

出版社

NATURE RESEARCH
DOI: 10.1038/s41467-021-21353-7

关键词

-

资金

  1. DOE Office of Basic Energy Sciences [DE-FG02-07ER46449]
  2. U.S. Department of Energy (DOE) [DE-FG02-07ER46449] Funding Source: U.S. Department of Energy (DOE)

向作者/读者索取更多资源

This study demonstrates dislocation-like phase singularities in interference patterns produced by condensate of indirect excitons. The analysis shows that the observed interference dislocations are not associated with exciton vortices and skyrmions. The results indicate that the interference dislocations originate from the moire effect in combined interference patterns of propagating condensate matter waves.
Interference patterns provide direct measurement of coherent propagation of matter waves in quantum systems. Superfluidity in Bose-Einstein condensates of excitons can enable long-range ballistic exciton propagation and can lead to emerging long-scale interference patterns. Indirect excitons (IXs) are formed by electrons and holes in separated layers. The theory predicts that the reduced IX recombination enables IX superfluid propagation over macroscopic distances. Here, we present dislocation-like phase singularities in interference patterns produced by condensate of IXs. We analyze how exciton vortices and skyrmions should appear in the interference experiments and show that the observed interference dislocations are not associated with these phase defects. We show that the observed interference dislocations originate from the moire effect in combined interference patterns of propagating condensate matter waves. The interference dislocations are formed by the IX matter waves ballistically propagating over macroscopic distances. The long-range ballistic IX propagation is the evidence for IX condensate superfluidity. Previous interference experiments on indirect excitons found dislocation-like phase singularities that could not be explained by common phase defects. Here, the authors explain these features in terms of the moire pattern of interference of condensate matter waves propagating over macroscopic distances.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据