Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2-xCexCuO4
2020-01-17
发表期刊NPJ QUANTUM MATERIALS
ISSN2397-4648
EISSN2397-4648
卷号5期号:1
发表状态已发表
DOI10.1038/s41535-019-0205-9
摘要

Electron correlations play a dominant role in the charge dynamics of the cuprates. We use resonant inelastic X-ray scattering (RIXS) to track the doping dependence of the collective charge excitations in electron doped La2-xCexCuO4 (LCCO). From the resonant energy dependence and the out-of-plane momentum dependence, the charge excitations are identified as three-dimensional (3D) plasmons, which reflect the nature of the electronic structure and Coulomb repulsion on both short and long lengthscales. With increasing electron doping, the plasmon excitations increase monotonically in energy, a consequence of the electron correlation effect on electron structure near the Fermi surface (FS). Importantly, the plasmon excitations evolve from a broad feature into a well-defined peak with much increased life time, revealing the evolution of the electrons from incoherent states to coherent quasiparticles near the FS. Such evolution marks the reduction of the short-range electronic correlation, and thus the softening of the Mottness of the system with increasing electron doping.

收录类别SCI ; SCIE
语种英语
资助项目Swiss Light Source at the Paul Scherrer Institut[20151449]
WOS研究方向Materials Science ; Physics
WOS类目Materials Science, Multidisciplinary ; Quantum Science & Technology ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000511425400002
出版者NATURE PUBLISHING GROUP
WOS关键词ENERGY-LOSS SPECTROSCOPY ; COLLECTIVE EXCITATIONS ; PLASMONS ; ELECTRODYNAMICS ; FLUCTUATIONS ; SCATTERING
原始文献类型Article
引用统计
文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/105354
专题物质科学与技术学院_PI研究组_李刚组
大科学中心_PI研究组_柳学榕组
通讯作者Yin, Zhiping; Dean, Mark P. M.; Liu, Xuerong
作者单位
1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
6.Beijing Normal Univ, Ctr Adv Quantum Studies, Beijing 100875, Peoples R China
7.Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England
8.Paul Scherrer Inst, Swiss Light Source, Photon Sci Div, CH-5232 Villigen, Switzerland
9.Zhengzhou Univ, Sch Phys Engn, Zhengzhou 450001, Peoples R China
10.Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院
第一作者的第一单位物质科学与技术学院
推荐引用方式
GB/T 7714
Lin, Jiaqi,Yuan, Jie,Jin, Kui,et al. Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2-xCexCuO4[J]. NPJ QUANTUM MATERIALS,2020,5(1).
APA Lin, Jiaqi.,Yuan, Jie.,Jin, Kui.,Yin, Zhiping.,Li, Gang.,...&Liu, Xuerong.(2020).Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2-xCexCuO4.NPJ QUANTUM MATERIALS,5(1).
MLA Lin, Jiaqi,et al."Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2-xCexCuO4".NPJ QUANTUM MATERIALS 5.1(2020).
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