Conference paper
Magnetic Field-Induced Closure of the Spin Excitation Gap near Optimal Doping in La2-xSrxCuO4
Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Swiss Federal Institute of Technology Zurich2
Universite Claude Bernard Lyon 13
Hokkaido University4
Muroran Institute of Technology5
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark6
Risø National Laboratory for Sustainable Energy, Technical University of Denmark7
Paul Scherrer Institute8
University of Copenhagen9
Swiss Federal Institute of Technology Lausanne10
University College London11
Technical University of Munich12
Institut Laue-Langevin13
...and 3 moreWe have investigated how a magnetic field applied perpendicular to the CuO2 planes of the near-optimally hole-doped high-temperature superconductor La1.855Sr0.145CuO4 (Tc ≈ 36 K) influences the low-energy magnetic excitation spectrum. Our detailed single-crystal neutron scattering experiments reveal that the gap to magnetic excitations falls off linearly with increasing field and reaches zero at the magnetic field µ0Hs=7±1 T required to induce long-range incommensurate magnetic order.
A comparison with the electron-doped cuprate Nd1.85Ce0.15CuO4 is made and the possible link between field-induced magnetic order and Fermi surface reconstruction in cuprates is discussed.We have investigated how a magnetic field applied perpendicular to the CuO2 planes of the near-optimally hole-doped high-temperature superconductor La1.855Sr0.145CuO4 (Tc ≈ 36 K) influences the low-energy magnetic excitation spectrum.
Our detailed single-crystal neutron scattering experiments reveal that the gap to magnetic excitations falls off linearly with increasing field and reaches zero at the magnetic field µ0Hs=7±1 T required to induce long-range incommensurate magnetic order. A comparison with the electron-doped cuprate Nd1.85Ce0.15CuO4 is made and the possible link between field-induced magnetic order and Fermi surface reconstruction in cuprates is discussed.
| Language: | English |
|---|---|
| Year: | 2011 |
| Proceedings: | International Workshop on Neutron Applications on Strongly Correlated Electron Systems 2011 |
| ISSN: | 03759598 |
| Types: | Conference paper |
| ORCIDs: | Christensen, Niels Bech |
