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Dimensional crossover in La1.85Sr0.15CuO4

✍ Scribed by Yishay Bruckental; Avner Shaulov; Yosef Yeshurun

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
194 KB
Volume
460-462
Category
Article
ISSN
0921-4534

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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