New Magnetic Coherence Effect in Superconducting La2-xSrxCuO4
Abstract
We have used inelastic neutron scattering to examine the magnetic fluctuations at intermediate frequencies in the simplest high temperature superconductor, La2-xSrxCuO4. The suppression of the low energy magnetic response in the superconducting state is accompanied by an increase in the response at higher energies. Just above a threshold energy of ~7 meV there is additional scattering present below Tc which is characterized by an extraordinarily long coherence length, in excess of 50 Å.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 1996
- DOI:
- 10.1103/PhysRevLett.77.1604
- arXiv:
- arXiv:cond-mat/9606084
- Bibcode:
- 1996PhRvL..77.1604M
- Keywords:
-
- Condensed Matter
- E-Print:
- 11 pages, RevTeX, 4 postscript figures