气候变化领域集成服务门户(CCPortal): Singular charge fluctuations at a magnetic quantum critical point

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DOI	10.1126/science.aag1595
	Singular charge fluctuations at a magnetic quantum critical point
	Prochaska L.; Li X.; MacFarland D.C.; Andrews A.M.; Bonta M.; Bianco E.F.; Yazdi S.; Schrenk W.; Detz H.; Limbeck A.; Si Q.; Ringe E.; Strasser G.; Kono J.; Paschen S.
发表日期	2020
ISSN	0036-8075
起始页码	285
结束页码	288
卷号	367 期号:6475
英文摘要	Strange metal behavior is ubiquitous in correlated materials, ranging from cuprate superconductors to bilayer graphene, and may arise from physics beyond the quantum fluctuations of a Landau order parameter. In quantum-critical heavy-fermion antiferromagnets, such physics may be realized as critical Kondo entanglement of spin and charge and probed with optical conductivity. We present terahertz time-domain transmission spectroscopy on molecular beam epitaxy–grown thin films of YbRh2Si2, a model strange-metal compound. We observed frequency over temperature scaling of the optical conductivity as a hallmark of beyond-Landau quantum criticality. Our discovery suggests that critical charge fluctuations play a central role in the strange metal behavior, elucidating one of the long-standing mysteries of correlated quantum matter. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	magnetic field molecular analysis quantum mechanics superconductivity article conductance
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133777
推荐引用方式 GB/T 7714	Prochaska L.,Li X.,MacFarland D.C.,et al. Singular charge fluctuations at a magnetic quantum critical point[J]. Science,2020,367(6475).
APA	Prochaska L..,Li X..,MacFarland D.C..,Andrews A.M..,Bonta M..,...&Paschen S..(2020).Singular charge fluctuations at a magnetic quantum critical point.,367(6475).
MLA	Prochaska L.,et al."Singular charge fluctuations at a magnetic quantum critical point".367.6475(2020).