Unravelling the Nature of the Spin Excitations Disentangled from the Charge Contributions in a Doped Cuprate Superconductor
Creators
- 1. Photon Science Division, Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
- 2. Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02093 Warsaw, Poland
- 3. Department of Quantum Matter Physics, University of Geneva, Quai Ernest-Ansermet 24, CH-1211 Genève 4, Switzerland
- 4. Institute for Theoretical Solid State Physics, IFW Dresden, 01171 Dresden, Germany
Description
The nature of the spin excitations in superconducting cuprates is a key question toward a unified understanding of the cuprate physics from long-range antiferromagnetism to superconductivity. The intense spin excitations up to the over-doped regime revealed by resonant inelastic X-ray scattering bring new insights as well as problems—like understanding their persistence or their relation to the collective excitations in ordered magnets (magnons). Here, we study the evolution of the spin excitations upon hole-doping the superconducting cuprate Bi2Sr2CaCu2O8+δ by disentangling the spin from the charge excitations in the experimental cross section. We compare our experimental results against density matrix renormalization group calculations for a t-J-like model on a square lattice. Our results unambiguously confirm the persistence of the spin excitations, which are closely connected to the persistence of short-range magnetic correlations up to high doping. This suggests that the spin excitations in hole-doped cuprates are related to magnons—albeit short-ranged.
Notes
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UnravellingNatureofSpinAndChargeExcitations-theory+expData.zip
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Additional details
Related works
- Is referenced by
- Preprint: 10.48550/arXiv.2204.08749 (DOI)
Funding
- Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials CRSII2_160765
- Swiss National Science Foundation
- Electron-Phonon Interactions in Rare-Earth Nickelates and Superconducting Cuprates 200021_178867
- Swiss National Science Foundation
- Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials CRSII2_141962
- Swiss National Science Foundation