Abstract
Abstract The phonons have been investigated for the structural transformation from tetragonal to orthorhombic in the case of high- T c YBa 2 Cu 3 O 7 using an angular force model. The zone centre phonons agree well with the Raman and the infrared measurements in the case of the tetragonal phase as compared to the orthorhombic one. The number of optical phonons do not show dispersion in the [00 q ] direction indicating strong two-dimensional features. The acoustical phonons exhibit phonon anomalies in both the tetragonal and the orthorhombic structures. The relevance of the phonons to the superconductivity are discussed.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Paper version not known
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
