Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La2−xSrxCuO4 (x=0.22)
O. J. Lipscombe, S. M. Hayden, B. Vignolle, D. F. McMorrow, T. G. Perring
DOI 10.1103/PhysRevLett.99.067002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La1.78Sr0.22CuO4 for the energy range 0–160 meV. Our measurements show that overdoping suppresses the strong response present for optimally doped La2−xSrxCuO4 which is peaked near 50 meV. The remaining response is peaked at incommensurate wave vectors for all energies investigated. We observe a strong high-frequency magnetic response for E≳80 meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.78Sr0.22CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | onset |
| La1.84Sr0.16CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Same Superconducting Criticality for Underdoped and Overdoped La2−xSrxCuO4 Single Crystals
similarity 0.97H. H. Wen et al.
Source status unknown — claims are unverified
Hidden Itinerant-Spin Phase in Heavily Overdoped La2−xSrxCuO4 Superconductors Revealed by Dilute Fe Doping: A Combined Neutron Scattering and Angle-Resolved Photoemission Study
similarity 0.96Rui-Hua He et al.
Source status unknown — claims are unverified
Structural instability in single crystals of the high-Tc superconductor La2−x Srx CuO4
similarity 0.96Urs Geiser et al.
Source status unknown — claims are unverified
Superconducting superoxygenated cuprates: Search for phase separation in La1.84Sr0.16CuO4+δ
similarity 0.95B. Morosin et al.
Source status unknown — claims are unverified
Infrared properties of epitaxial La2−xSrxCuO4 thin films in the normal and superconducting states
similarity 0.95F. Gao et al.
Source status unknown — claims are unverified
Commensurate Spin Dynamics in the Superconducting State of an Electron-Doped Cuprate Superconductor
similarity 0.95K. Yamada et al.
Source status unknown — claims are unverified