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High energy spin dynamics of La2CuO4and La1.9Sr0.1CuO4

✍ Scribed by N. Pyka; L. Pintschovius; A. Yu. Rumiantsev

Book ID
112516968
Publisher
Springer
Year
1991
Tongue
English
Weight
475 KB
Volume
82
Category
Article
ISSN
1434-6036

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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