Lattice Instability in Single-Crystal La sub 2-X Sr sub X CuO sub 4

摘要

The structural phase transition from the tetragonal to the orthorhombic phase of doped and undoped samples of La/sub 2-x/Sr/sub x/CuO sub 4 has been investigated by using inelastic neutron scattering techniques. The rotational nature of the soft mode leads to moderate electron-phonon coupling and the mode is unlikely to enhance significantly conventional phonon mediated superconductivity. 13 refs., 3 figs., 1 tab. (ERA citation 13:047876)