OXYGEN PHONONS IN ORTHORHOMBIC AND TETRAGONAL TL2BA2CUO6 INVESTIGATEDBY RAMAN-SCATTERING

Authors
KALL M BORJESSON L STROM C ERIKSSON S JOHANSSON LG
Citation
M. Kall et al., OXYGEN PHONONS IN ORTHORHOMBIC AND TETRAGONAL TL2BA2CUO6 INVESTIGATEDBY RAMAN-SCATTERING, Physica. C, Superconductivity, 220(1-2), 1994, pp. 131-137
Citations number
24
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
220
Issue
1-2
Year of publication
1994
Pages
131 - 137
Database
ISI
SICI code
0921-4534(1994)220:1-2<131:OPIOAT>2.0.ZU;2-2
Abstract
The phonon spectrum of the Tl2Ba2CuO6 compound has been investigated b y Raman scattering for variations in the Tl and oxygen contents. We ob serve large changes of the vibrational frequencies and lineshapes of t he apical oxygen, O(2), and the oxygen in the double TlO layer, O(3), for a Tl content which coincides with the orthorhombic-tetragonal phas e transition. Oxygen annealed samples (T-c approximate to 20 K) exhibi t slightly lower frequencies of the O(2) and O(3) modes than the as-si ntered samples (T-c approximate to 70K).