气候变化领域集成服务门户(CCPortal): An ideal Josephson junction in an ultracold two-dimensional Fermi gas

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DOI	10.1126/science.aaz2342
	An ideal Josephson junction in an ultracold two-dimensional Fermi gas
	Luick N.; Sobirey L.; Bohlen M.; Singh V.P.; Mathey L.; Lompe T.; Moritz H.
发表日期	2020
ISSN	10959203
起始页码	89
结束页码	91
卷号	369 期号:6499
英文摘要	The role of reduced dimensionality in high-temperature superconductors is still under debate. Recently, ultracold atoms have emerged as an ideal model system to study such strongly correlated two-dimensional (2D) systems. Here, we report on the realization of a Josephson junction in an ultracold 2D Fermi gas. We measure the frequency of Josephson oscillations as a function of the phase difference across the junction and find excellent agreement with the sinusoidal current phase relation of an ideal Josephson junction. Furthermore, we determine the critical current of our junction in the crossover from tightly bound molecules to weakly bound Cooper pairs. Our measurements clearly demonstrate phase coherence and provide strong evidence for superfluidity in a strongly interacting 2D Fermi gas. Copyright © 2020, American Association for the Advancement of Science.
关键词	article oscillation
语种	英语
来源机构	Science (New York, N.Y.)
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133380
推荐引用方式 GB/T 7714	Luick N.,Sobirey L.,Bohlen M.,et al. An ideal Josephson junction in an ultracold two-dimensional Fermi gas[J]. Science (New York, N.Y.),2020,369(6499).
APA	Luick N..,Sobirey L..,Bohlen M..,Singh V.P..,Mathey L..,...&Moritz H..(2020).An ideal Josephson junction in an ultracold two-dimensional Fermi gas.,369(6499).
MLA	Luick N.,et al."An ideal Josephson junction in an ultracold two-dimensional Fermi gas".369.6499(2020).