Doping dependence of the magnetic excitations in La2-xSrxCuO4

Article

关键词: X-RAY-SCATTERING;    HIGH-TEMPERATURE SUPERCONDUCTIVITY;    SPIN EXCITATIONS;    HIGH-RESOLUTION;    LA2CUO4;    DYNAMICS;    BEAMLINE;    STRIPES;    OXIDES;    LAYER;   

DOI  :  10.1103/PhysRevB.95.075139

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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