Lipscombe, OJ;
Hayden, SM;
Vignolle, B;
McMorrow, DF;
Perring, TG;
(2007)
Persistence of high-frequency spin fluctuations in overdoped superconducting La2-xSrxCuO4 (x=0.22).
PHYS REV LETT
, 99
(6)
, Article 067002. 10.1103/PhysRevLett.99.067002.
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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 greater than or similar to 80 meV suggesting that significant antiferromagnetic exchange couplings persist well into the overdoped part of the cuprate phase diagram.
| Type: | Article |
|---|---|
| Title: | Persistence of high-frequency spin fluctuations in overdoped superconducting La2-xSrxCuO4 (x=0.22) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.99.067002 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.067002 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| Keywords: | TRANSITION-TEMPERATURE SUPERCONDUCTOR, MAGNETIC EXCITATIONS, FERMI-SURFACE, DEPENDENCE, DYNAMICS, LA2CUO4 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/120367 |
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