Doping dependence of the magnetic excitations in La2xSrxCuO4

D Meyers, H Miao, A Walters, V Bisogni, Ross Springell, M d'Astuto, M Danz, J Pelliciari, H Huang, J Okamoto, D Huang, J Hill, X He, I Bozovic, T Schmitt, M Dean

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Abstract

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.
Original languageEnglish
Article number075139
Number of pages7
JournalPhysical Review B
Volume95
Issue number7
Early online date21 Feb 2017
DOIs
Publication statusPublished - Feb 2017

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