%0 Journal Article
%T Lattice dynamical signature of charge density wave formation in underdoped YBa2Cu3O6+x
%A M. Bakr
%A S. M. Souliou
%A S. Blanco-Canosa
%A I. Zegkinoglou
%A H. Gretarsson
%A J. Strempfer
%A T. Loew
%A C. T. Lin
%A R. Liang
%A D. A. Bonn
%A W. N. Hardy
%A B. Keimer
%A M. Le Tacon
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.88.214517
%X We report a detailed Raman scattering study of the lattice dynamics in detwinned single crystals of the underdoped high temperature superconductor YBa2Cu3O6+x (x=0.75, 0.6, 0.55 and 0.45). Whereas at room temperature the phonon spectra of these compounds are similar to that of optimally doped YBa2Cu3O6.99, additional Raman-active modes appear upon cooling below ~170-200 K in underdoped crystals. The temperature dependence of these new features indicates that they are associated with the incommensurate charge density wave state recently discovered using synchrotron x-ray scattering techniques on the same single crystals. Raman scattering has thus the potential to explore the evolution of this state under extreme conditions.
%U http://arxiv.org/abs/1312.1082v1