Emergence of fermi pockets in a new excitonic charge-density-wave melted superconductor

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	Emergence of fermi pockets in a new excitonic charge-density-wave melted superconductor
	Qian, D ; Hsieh, D ; Wray, L ; Morosan, E ; Wang, NL ; Xia, Y ; Cava, RJ ; Hasan, MZ
刊名	PHYSICAL REVIEW LETTERS
	2007
卷号	98 期号:11
ISSN号	0031-9007
中文摘要	A superconducting state (T-c similar to 4.2 K) has very recently been observed upon successful doping of the charge-density-wave (CDW) ordered triangular lattice TiSe2, with copper. Using state-of-the-art photoemission spectroscopy we identify, for the first time, momentum-space locations of doped electrons that form the Fermi sea of the superconductor. With doping, we find that kinematic nesting volume increases, whereas coherence of the CDW collective order sharply drops. In superconducting doping, as chemical potential rises, we observe the emergence of a large density of states in the form of a narrow electron pocket near the L point of the Brillouin zone with d-like character. The k-space spectral evolution directly demonstrates, for the first time, that the CDW order parameter microscopically competes with superconductivity in the same band.
收录类别	SCI
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37282]
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	Qian, D,Hsieh, D,Wray, L,et al. Emergence of fermi pockets in a new excitonic charge-density-wave melted superconductor[J]. PHYSICAL REVIEW LETTERS,2007,98(11).
APA	Qian, D.,Hsieh, D.,Wray, L.,Morosan, E.,Wang, NL.,...&Hasan, MZ.(2007).Emergence of fermi pockets in a new excitonic charge-density-wave melted superconductor.PHYSICAL REVIEW LETTERS,98(11).
MLA	Qian, D,et al."Emergence of fermi pockets in a new excitonic charge-density-wave melted superconductor".PHYSICAL REVIEW LETTERS 98.11(2007).