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research article

Spin dynamics in the mixed phase of La2-xSrxCuO4 (x=0.10, x=0.17)

Gilardi, R.
•
Streule, S.
•
Hiess, A.
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2004
Physica B-Condensed Matter

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.

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Type
research article
DOI
10.1016/j.physb.2004.03.257
Author(s)
Gilardi, R.
•
Streule, S.
•
Hiess, A.
•
Ronnow, H. M.  
•
Oda, M.
•
Momono, N.
•
Ido, M.
•
Mesot, J.
Date Issued

2004

Published in
Physica B-Condensed Matter
Volume

350

Issue

1-3

Start page

72

End page

75

Subjects

high-T

•

superconductor

•

spin excitations

•

magnetic field

•

HIGH-TEMPERATURE SUPERCONDUCTOR

•

NEUTRON-SCATTERING

•

FLUCTUATIONS

•

VORTICES

•

ORDER

•

GAP

Note

Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland. Paul Scherrer Inst, CH-5232 Villigen, Switzerland. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. CEA, DRFMC, CENG, F-38054 Grenoble 9, France. Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan. Gilardi, R, Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland. raffaele.gilardi@psi.ch

Peer reviewed

REVIEWED

Written at

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Available on Infoscience
January 24, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/239945
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