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Static and Dynamic Spins in Superconducting La2?x Sr x CuO4: The Risø Years |
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| Authors: | K Lefmann B Lake G Aeppli S-W Cheong N B Christensen K N Clausen S Hayden T E Mason DF McMorrow H A Mook H M Rønnow H Takagi |
| Affiliation: | 1. Department of Materials Research, Ris? National Laboratory, DK-4000, Roskilde, Denmark 2. Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX 13PU, U.K 3. London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, U.K 4. Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, 08854, USA 5. Condensed Matter Research with Neutrons and Muons, Paul Scherrer Institut, CH-5232, Villigen PSI, Switzerland 6. H.H. Wills Physical Laboratory, University of Bristol, Bristol, BS8 1TL, U.K 7. Spallation Neutron Source, 701 Scarboro Road, Oak Ridge, TN, 37880, USA 8. Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA 9. Graduate School of Frontier Sciences and Institute for Solid State Physics, University of Tokyo, Hongo, Tokyo, 113-8656, Japan |
| Abstract: | One important area of modern condensed matter research is the investigation of the nature of the superconducting cuprates. Much progress in this field has been obtained with the technique of neutron scattering. We here present a review of neutron scattering studies of the high-temperature superconductor La2?xSrxCuO4, performed at Risø National Laboratory. We review the work on the mapping of the incommensurate spin fluctuations, the investigation of the gap in the fluctuation spectrum, the magnetic properties of the vortices appearing in an applied field, and the quantum critical behaviour of the system. We discuss our findings in the light of results of neutron scattering from other groups, on other cuprate systems, and results from other experimental methods, e.g. NMR, μSR, STM, X-ray diffraction, and ARPES. We end with a discussion on the implications of the experimental results for the progress in the general understanding of high-temperature superconductivity. PACS numbers: 61.12.Ex, 74.20.Mn, 74.72.Dn, 75.25.+z, 78.70.Nx. |
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