Coexistence of Fermi arcs and Fermi pockets in a high-T-c copper oxide superconductor

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	Coexistence of Fermi arcs and Fermi pockets in a high-T-c copper oxide superconductor
	Meng, JQ ; Liu, GD ; Zhang, WT ; Zhao, L ; Liu, HY ; Jia, XW ; Mu, DX ; Liu, SY ; Dong, XL ; Zhang, J ; Lu, W ; Wang, GL ; Zhou, Y ; Zhu, Y ; Wang, XY ; Xu, ZY ; Chen, CT ; Zhou, XJ
刊名	NATURE
	2009
卷号	462 期号:7271 页码:335
关键词	HIGH-TEMPERATURE SUPERCONDUCTORS QUANTUM OSCILLATIONS SURFACE BI2SR2CACU2O8+DELTA EVOLUTION PSEUDOGAP STATE GAP
ISSN号	0028-0836
通讯作者	Zhou, XJ: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China.
中文摘要	In the pseudogap state of the high-transition-temperature (high-T-c) copper oxide superconductors(1), angle-resolved photoemission (ARPES) measurements have seen Fermi arcs-that is, open-ended gapless sections in the large Fermi surface(2-8)-rather than a closed loop expected of an ordinary metal. This is all the more puzzling because Fermi pockets (small closed Fermi surface features) have been suggested by recent quantum oscillation measurements(9-14). The Fermi arcs cannot be understood in terms of existing theories, although there is a solution in the form of conventional Fermi surface pockets associated with competing order, but with a back side that is for detailed reasons invisible to photoemission probes(15). Here we report ARPES measurements of Bi2Sr2-xLaxCuO6+delta (La-Bi2201) that reveal Fermi pockets. The charge carriers in the pockets are holes, and the pockets show an unusual dependence on doping: they exist in underdoped but not overdoped samples. A surprise is that these Fermi pockets appear to coexist with the Fermi arcs. This coexistence has not been expected theoretically.
收录类别	SCI
资助信息	NSFC; MOST of China; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34794]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Meng, JQ,Liu, GD,Zhang, WT,et al. Coexistence of Fermi arcs and Fermi pockets in a high-T-c copper oxide superconductor[J]. NATURE,2009,462(7271):335.
APA	Meng, JQ.,Liu, GD.,Zhang, WT.,Zhao, L.,Liu, HY.,...&Zhou, XJ.(2009).Coexistence of Fermi arcs and Fermi pockets in a high-T-c copper oxide superconductor.NATURE,462(7271),335.
MLA	Meng, JQ,et al."Coexistence of Fermi arcs and Fermi pockets in a high-T-c copper oxide superconductor".NATURE 462.7271(2009):335.