Abstract
The phonon dispersions of [Formula presented] along the [Formula presented] direction have been determined by inelastic x-ray scattering. Compared to the undoped parent compound, the two highest longitudinal phonon branches, associated with the Cu-O bond stretching and out-of-plane oxygen vibration, are shifted to lower energies. Moreover, an anomalous softening of the bond-stretching band is observed at about [Formula presented]. These signatures provide evidence for strong electron-phonon coupling in this electron-doped high-temperature superconductor.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4 |
| Number of pages | 1 |
| Journal | Physical review letters |
| Volume | 88 |
| Issue number | 16 |
| DOIs | |
| State | Published - 2002 |