The Spin Excitation Spectrum in Superconducting YBa2Cu3O6.85
By P. Bourges, Y. Sidis, H. Fong, L. Regnault, J. Bossy, A. Ivanov, Bernhard Keimer. 2000
166 citations recorded by the source corpus.
A comprehensive inelastic neutron scattering study of magnetic excitations in the near optimally doped high-temperature superconductor YBa2Cu3O6.85 is presented. The spin correlations in the normal state are commensurate with the crystal lattice, and the intensity is peaked around the wave vector characterizing the antiferromagnetic state of the insulating precursor, YBa2Cu3O6. Profound modifications of the spin excitation spectrum appear abruptly below the superconducting transition temperature T c, where a commensurate resonant mode and a set of weaker incommensurate peaks develop. The data are consistent with models that are based on an underlying two-dimensional Fermi surface, predicting a continuous, downward dispersion relation connecting the resonant mode and the incommensurate excitations. The magnetic incommensurability in the YBa2Cu3O6+ x system is thus not simply related to that of another high-temperature superconductor, La2– x Sr x CuO4, where incommensurate peaks persist well above T c. The temperature-dependent incommensurability is difficult to reconcile with interpretations based on charge stripe formation in YBa2Cu3O6+ x near optimum doping.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/0f8e4b423fff4237737a85cb58c852715c783e2f
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In Atomic and Molecular Physics, and Optics
- Patrick Lee
- N. Nagaosa
- X. Wen
- Ashvin Vishwanath
- D. Gaiotto
- M. B. Hastings
- Ryan Thorngren
- Zhenghan Wang
In Condensed Matter Physics
Citations in the corpus
- Doping a Mott insulator: Physics of high-temperature superconductivity (2004, background): “Further support of the triplet exciton idea comes from the observation that incommensurate branches extend below the resonance energy (Bourges et al., 2000).”
- Spin dynamics in the pseudogap state of a high-temperature superconductor (2006, unknown): “2a,b) already familiar from previous work [2, 4, 11, 23].”
- Colossal Magnetoresistant Materials: The Key Role of Phase Separation (2000, background): “…to 1D-like regions of the 2D plane that are populated by holes, leaving undoped the area between the stripes, similar to those structures that are believed to occur in some high-temperature superconductors and (t}J)-like models (Tranquada, 1995; Dai et al., 1998; Mook, 1998; Bourges et al., 2000.”
- Coherent terahertz control of antiferromagnetic spin waves (2011, unknown): “Despite their significance in strongly correlated material”