Effect of Ba-doping on zone-boundary phonons in La2CuO4

Authors
Thonhauser, T Ambrosch-Draxl, C
Citation
T. Thonhauser et C. Ambrosch-draxl, Effect of Ba-doping on zone-boundary phonons in La2CuO4, PHYSICA C, 341, 2000, pp. 281-282
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
341
Year of publication
2000
Part
1
Pages
281 - 282
Database
ISI
SICI code
0921-4534(200011)341:<281:EOBOZP>2.0.ZU;2-6
Abstract
We have calculated zone-boundary phonons in La2-xBaxCuO4 for x = 0 up to x = 0.4. In case of x = 0.1 a strongly anharmonic potential for the oxygen Cu -O bond-stretching mode in the CuO2 plane at the N point was found. We ther efore predict a softening similar to the experimental findings recently obs erved in Sr-doped La2CuO4.