Spin dynamics in the mixed phase of La2−Sr CuO4 (x=0.10, x=0.17)
| Autor: | Henrik M. Rønnow, Naoki Momono, R. Gilardi, Joël Mesot, Migaku Oda, A. Hiess, S. Streule, Masayuki Ido |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Superconductivity Mesoscopic physics Condensed matter physics Spin polarization Neutron scattering Inelastic scattering Condensed Matter Physics Inelastic neutron scattering Electronic Optical and Magnetic Materials Vortex Magnetic field Condensed Matter::Superconductivity Electrical and Electronic Engineering |
| Zdroj: | Physica B: Condensed Matter. 350:72-75 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2004.03.257 |
| Popis: | We present an inelastic neutron scattering study of the spin dynamics in the mixed phase of the high-T-c superconductor La2-xSrxCuO4, In the overdoped regime (x = 0. 17, T-c = 37 K) the application of a magnetic field induces a spectral weight redistribution centered around the zero-field spin gap (Delta(SG) approximate to 5 6.5 meV). Moreover the opening of the spin gap seems to track the irreversibility temperature (related to the melting of the vortex lattice) rather than T-c, indicating an unusual interplay between the mesoscopic and microscopic properties in La2-xSrxCuO4. In the underdoped regime (x = 0. 10, T-c = 29 K) our zero-field data indicate a strong decrease (or even vanishing) of the spin gap in the superconducting state and no dependence upon the application of a magnetic field. |
| Databáze: | OpenAIRE |
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