Lattice dynamics and ionicity in the high-temperature superconductors
Abstract
Harmonically unstable double-well-potential surfaces are found for both La2CuO4 and YBa2Cu3O7 which may be related to the high-temperature superconductivity. The potential induced breathing model was applied to La2CuO4 and YBa2Cu3O7 and it is found that the ionic description gives semiquantitative agreement with structural and vibrational observations. A comparison was made with self-consistent linearized augmented plane wave calculations and it is shown that ionic contributions to the bonding and lattice dynamics of oxide superconductors are large.
- Publication:
-
High-Temperature Superconductors
- Pub Date:
- 1988
- Bibcode:
- 1988mrs..proc..825C
- Keywords:
-
- Crystal Lattices;
- High Temperature Superconductors;
- Lanthanum Oxides;
- Quantum Wells;
- Yttrium Oxides;
- Barium Oxides;
- Carrier Density (Solid State);
- Copper Oxides;
- Phonons;
- Solid-State Physics