期刊
PHYSICAL REVIEW B
卷 95, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.075139
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Early Career Award Program [1047478]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC00112704]
- Dysenos AG by Kabelwerke Brugg AG Holding
- Fachhochschule Nordwestschweiz
- Paul Scherrer Institut
- Swiss National Science Foundation [200021L 141325]
- U. S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division
- Swiss National Science Foundation through the D-A-CH program (SNSF) [200021L 141325]
- Swiss National Science Foundation (SNF) [200021L_141325] Funding Source: Swiss National Science Foundation (SNF)
The magnetic correlations within the cuprates have undergone intense scrutiny as part of efforts to understand high-temperature superconductivity. We explore the evolution of the magnetic correlations along the nodal direction of the Brillouin zone in La2-xSrxCuO4, spanning the doping phase diagram from the antiferromagnetic Mott insulator at x = 0 to the metallic phase at x = 0.26. Magnetic excitations along this direction are found to be systematically softened and broadened with doping, at a higher rate than the excitations along the antinodal direction. This phenomenology is discussed in terms of the nature of the magnetism in the doped cuprates. Survival of the high-energy magnetic excitations, even in the overdoped regime, indicates that these excitations are marginal to pairing, while the influence of the low-energy excitations remains ambiguous.
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