Abstract
We investigate the high-energy magnetic excitation spectrum of the high-T-c cuprate superconductor Bi2Sr2CaCu2O8+delta (Bi-2212) using Cu L-3 edge resonant inelastic x-ray scattering. Broad, dispersive magnetic excitations are observed, with a zone boundary energy of similar to 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. DOI: 10.1103/PhysRevLett.110.147001
Original language | English |
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Article number | 147001 |
Number of pages | 6 |
Journal | Physical Review Letters |
Volume | 110 |
Issue number | 14 |
DOIs | |
Publication status | Published - 3 Apr 2013 |
Keywords
- HIGH-TEMPERATURE SUPERCONDUCTOR
- T-C SUPERCONDUCTORS
- SPIN EXCITATIONS
- NORMAL-STATE
- LA2CUO4