Neutron scattering study of the magnetic excitations in metallic and superconducting La2−xSrxCuO4−y
T. R. Thurston, R. J. Birgeneau, M. A. Kastner, N. W. Preyer, G. Shirane, Y. Fujii, K. Yamada, Y. Endoh, K. Kakurai, M. Matsuda, Y. Hidaka, T. Murakami
DOI 10.1103/PhysRevB.40.4585 · Physical Review B
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 on neutron scattering studies of the dynamic spin correlations in La2−xSrxCuO4−y. Two superconducting and one nonsuperconducting single crystals were studied. All three of the samples exhibited metallic normal-state resistivity modified by corrections consistent with localization effects. The structure factor S(Q,ω) measured in these samples reflects to a first approximation short-range two-dimensional antiferromagnetic spin correlations closely related to those found in insulating La2CuO4. In addition, S(Q,ω) measured in the superconducting samples has an incommensurate, double-peaked structure which is not present in the nonsuperconducting crystal. The integrated ( F dQ) intensities of the scattering at both concentrations are nearly independent of temperature over the range kBT≫ħω to kBT≪ħω for energy transfers greater than ∼6 meV. Furthermore, the difference in the temperature dependence of the intensity between the nonsuperconducting and superconducting samples for energy transfers less than ∼6 meV suggests that a gap may be forming in the magnetic excitation spectrum of the superconducting samples. The relationship of these results to the superconductivity in La2−xSrxCuO4−y is discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Theory of the magnetic excitations in the Cu-O superconductors
similarity 0.97Per Hedegrd & Michael Brix Pedersen
Source status unknown — claims are unverified
Magnetic excitations in La-based cuprate superconductors: Slave-boson mean-field analysis of the two-dimensional t−J model
similarity 0.97Hiroyuki Yamase
Source status unknown — claims are unverified
Hole concentration dependence of the magnetic moment in superconducting and insulating La2−xSrxCuO4
similarity 0.97S. Wakimoto et al.
Source status unknown — claims are unverified
Evidence for a charge collective mode associated with superconductivity in copper oxides from neutron and x-ray scattering measurements of La2−xSrxCuO4
similarity 0.96S. R. Park et al.
Source status unknown — claims are unverified
Spiral Spin State in High-Temperature Copper-Oxide Superconductors: Evidence from Neutron Scattering Measurements
similarity 0.96Per-Anker Lindgård
Source status unknown — claims are unverified
Neutron scattering studies of spin-phonon hybridization and superconducting spin gaps in the high-temperature superconductor La2−x(Sr,Ba)xCuO4
similarity 0.96J. J. Wagman et al.
Source status unknown — claims are unverified