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Search for electron-phonon coupling induced linewidths in La1.9Sr0.1CuO4

โœ Scribed by L. Pintschovius; W. Reichardt; A.Yu. Rumiantsev; A.S. Ivanov; N.L. Mitrofanoc

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
204 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

Inelastic neutron scattering experiments were performed on a single crystal of Lal.gSro.tCuO4 to search tbr electron-phonon coupling induced line broadenings. Further measurements were made on undoped La2CuO4 as a reference to isolate the electron-phonon coupling contribution to the experimental linewidth. The most pronounced line broadening was found for a Z-point phonon involving apical oxygen displacements along c, in agreement with theory.

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High-energy phonon dispersion in La1.85S
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โœ A.H. Moudden; P.M. Gehring; G. Shirane; M. Matsuda; L. Vasiliu-Doloc; B. Hennion ๐Ÿ“‚ Article ๐Ÿ“… 1995 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 189 KB

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