High-Energy Magnetic Excitations in the Cuprate Superconductor Bi2Sr2CaCu2O8+δ: Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom
M. P. M. Dean, A. J. A. James, R. S. Springell, X. Liu, C. Monney, K. J. Zhou, R. M. Konik, J. S. Wen, Z. J. Xu, G. D. Gu, V. N. Strocov, T. Schmitt, J. P. Hill
DOI 10.1103/PhysRevLett.110.147001 · Physical Review Letters
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Abstract
We investigate the high-energy magnetic excitation spectrum of the high-Tc cuprate superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) using Cu L3 edge resonant inelastic x-ray scattering. Broad, dispersive magnetic excitations are observed, with a zone boundary energy of ∼300 meV and a weak dependence on doping. These excitations are strikingly similar to the bosons proposed to explain the high-energy “kink” observed in photoemission. A phenomenological calculation of the spin response, based on a parametrization of the the angle-resolved photoemission spectroscopy derived electronic structure and Yang-Rice-Zhang quasiparticles, provides a reasonable prediction of the energy dispersion of the observed magnetic excitations. These results indicate a possible unified framework to reconcile the magnetic and electronic properties of the cuprates and we discuss the advantages and disadvantages of such an approach.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | unknown |
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