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Josephson plasma edge in La1.85Sr0.15CuO4

โœ Scribed by P.J.M. van Bentum; A.M. Gerrits; M.E.J. Boonman; A. Wittlin; V.H.M. Duijn; A.A. Menovsky


Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
386 KB
Volume
211
Category
Article
ISSN
0921-4526

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We have measured two phonon-dispersion curves above 50meV in a superconducting (T~ = 33 K) single crystal of Lal.85Sro.tsCuO4. In the normal phase (T =45 K), we show that the A, mode compatible with the Raman A, g (425 cm -1) mode is weakly dispersive, falling from 53.7 meV at the zone center to abo