… The dispersion of the highest energy LO phonon branch in … 82, 628 1999 , we find that
the dispersion is continuous … in the dispersion of the highest energy LO phonon branch in …

… , seem to be inconsistent with the wave vector of the affected phonon. The Fermi surface …
these phonon phenomena more closely and have discovered that the anomalous nature of the …

… In the optimally doped LaCuO crystal we find for the phonon anomalies OX B and 1/2 an
enhanced contribution to the screening from the more extended orbitals which on the other …

… pattern of this phonon (see Fig. 2). However, from the very steep dispersion of the LO branch
at (=0.25 (not reproduced by LDA theory) and from the peak of the phonon linewidth at (=…

… strontium-doped compounds with similar Tc, we rule out a connection between the phonon
anomaly … We interpret the phonon anomaly as a signature of correlated charge fluctuations …

… [31] who reported anomalous lineshape and temperature dependence of the bond-stretching
phonons in La 1.85 Sr 0.15 CuO 4 near q = (0.25,0, 0) and interpreted these results in …

… they are dopedwith Ba, Sr (R= La; T structure) … have shown that the Aq„-LO phonon has an
energy of only 559 crn … modes are essentially dispersionless [A2„, also E„(LO)=593cm i] or …

… revealed that the phonon softening in the (100) direction starts to saturate around optimal
doping (x=0.15). … It bears clear resemblance to phonon anomalies found in many conventional …

… [52] who reported anomalous lineshape and temperature dependence of the bond-stretching
phonons in La 1.85 Sr 0.15 CuO 4 near q = (0.25, 0, 0) (Fig. 12) and interpreted these …

… and linewidth of the highest-energy A and 2ı phonon branches in La , Sr. CuO4. The picture
on … Oxygen ion in BaO planes is located above the Cu ion and together with four CuO-plane …