Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal

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	Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
	Dean, MPM ; Dellea, G ; Springell, RS ; Yakhou-Harris, F ; Kummer, K ; Brookes, NB ; Liu, X ; Sun, YJ ; Strle, J ; Schmitt, T ; Braicovich, L ; Ghiringhelli, G ; Bozovic, I ; Hill, JP
刊名	NATURE MATERIALS
	2013
卷号	12 期号:11 页码:1018
ISSN号	1476-1122
通讯作者	Dean, MPM (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
中文摘要	One of the most intensely studied scenarios of high-temperature superconductivity (HTS) postulates pairing by exchange of magnetic excitations(1). Indeed, such excitations have been observed up to optimal doping in the cuprates(2-7). In the heavily overdoped regime, neutron scattering measurements indicate that magnetic excitations have effectively disappeared(8-10), and this has been argued to cause the demise of HTS with overdoping(1,8,10). Here we use resonant inelastic X-ray scattering, which is sensitive to complementary parts of reciprocal space, to measure the evolution of the magnetic excitations in La2-xSrxCuO4 across the entire phase diagram, from a strongly correlated insulator (x = 0) to a non-superconducting metal (x = 0.40). For x = 0, well-defined magnon excitations are observed(11). These magnons broaden with doping, but they persist with a similar dispersion and comparable intensity all the way to the non-superconducting, heavily overdoped metallic phase. The destruction of HTS with overdoping is therefore caused neither by the general disappearance nor by the overall softening of magnetic excitations. Other factors, such as the redistribution of spectral weight, must be considered.
资助信息	Center for Emergent Superconductivity, an Energy Frontier Research Center; US DOE, Office of Basic Energy Sciences; Office of Basic Energy Sciences, Division of Materials Science and Engineering, US Department of Energy [DEAC02-98CH10886]; Italian Ministry of Research MIUR [PRIN- 20094W2LAY]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57323]
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	Dean, MPM,Dellea, G,Springell, RS,et al. Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal[J]. NATURE MATERIALS,2013,12(11):1018.
APA	Dean, MPM.,Dellea, G.,Springell, RS.,Yakhou-Harris, F.,Kummer, K.,...&Hill, JP.(2013).Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal.NATURE MATERIALS,12(11),1018.
MLA	Dean, MPM,et al."Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal".NATURE MATERIALS 12.11(2013):1018.