In-plane Isotropy of the Low Energy Phonon Anomalies in YBa${}_2$Cu${}_3$O${}_{6+x}$

Abstract

We study the temperature dependence of the low energy phonons in the $(H,0,L)$ reciprocal plane of the highly ordered ortho-II YBa${}_2$Cu${}_3$O${}_{6.55}$ cuprate high temperature superconductor by means of high-resolution inelastic x-ray scattering. Anomalies associated with the emergence of long-range charge density wave (CDW) fluctuations are observed, and are qualitatively similar to those previously observed in the $(0,K,L)$ plane. This confirms the unconventional nature of this bi-dimensional CDW, which is not soft-phonon driven. With the support of first principles calculations, the symmetry of the anomalous phonon is identified and is found to match that of the charge modulation. This suggests in turn that these anomalies originate from a direct coupling between the phonons and the collective CDW excitations.

arXiv comment10 pages, Invitated paper on a JPSJ Special Issue "Charge orders and fluctuations in high-Tc cuprates"

References in corpus (30)

• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Extended Phonon Collapse and the Origin of the Charge-Density-Wave in NbSe${}_2$
• Three-Dimensional Charge Density Wave Order in YBa2Cu3O6.67 at High Magnetic Fields
• Electron-phonon coupling reflecting dynamic charge inhomogeneity in copper-oxide superconductors
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates
• Resonant X-ray Scattering Study of Charge Density Wave Correlations in YBa${}_2$Cu${}_3$O${}_{6+x}$
• Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe${}_2$
• Giant phonon anomalies and central peak due to charge density wave formation in YBa${}_2$Cu${}_3$O${}_{6.6}$
• X-ray diffraction observation of charge density wave order at zero magnetic field in ortho-II YBa${}_2$Cu${}_3$O${}_{6.54}$
• Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy
• Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
• Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ
• Phonon dispersion and electron-phonon interaction for YBa_2Cu_3O_7 from first-principles calculations
• Ideal charge density wave order in the high-field state of superconducting YBCO
• Giant Kohn anomaly and the phase transition in charge density wave ZrTe_3
• Charge ordering in superconducting copper oxides
• An inelastic x-ray study of phonon broadening and charge density wave formation in ortho-II ordered YBa2Cu3O6.54
• Spectroscopic Evidence for Charge Order Melting via Quantum Fluctuations in a Cuprate
• Charge density waves in YBa${}_2$Cu${}_3$O${}_{6.67}$ probed by resonant x-ray scattering under uniaxial compression
• Incommensurate phonon anomaly and the nature of charge density waves in cuprates
• Phonon anomalies and dynamic stripes
• Isotope effect and bond-stretching phonon anomaly in high-Tc cuprates
• Evidence for a charge collective mode associated with superconductivity in copper oxides from neutron and x-ray scattering measurements of La${}_{2-x}$Sr${}_x$CuO${}_4$
• Highly anisotropic anomaly in the dispersion of the copper-oxygen bond-bending phonon in superconducting YBa2Cu3O7 from inelastic neutron scattering
• Phonon anomalies due to stripe collective modes in high T_c cuprates
• Oxygen superstructures throughout the phase diagram of $(\mathbf{Y},\mathbf{Ca})\mathbf{B}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6+\mathbf{x}}$
• Rapid Suppression of the Charge Density Wave in YBa${}_2$Cu${}_3$O${}_{6.6}$ under Hydrostatic Pressure
• NMR study of charge density waves under hydrostatic pressure in YBa2Cu3Oy
• Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa${}_2$Cu${}_3$O${}_{6.67}$
• Inelastic X-ray scattering studies of phonon dispersions in superconductors at high pressures

Cited by in corpus (5)

• Possible enhancement of the superconducting $T_c$ due to sharp Kohn-like soft phonon anomalies
• Charge order near the antiferromagnetic quantum critical point in the trilayer high $T_c$ cuprate HgBa${}_2$Ca${}_2$Cu${}_3$O${}_{8+\delta }$
• Hybridization of lattice and charge order excitations in a superconducting cuprate
• Resonant x-ray scattering study of charge-density wave correlations in YBa${}_2$Cu${}_3$O${}_{6+x}$ under uniaxial stress
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates