Polaronic Effect and Its Impact on T
for Novel Layered Superconducting Systems
- Author(s): Kresin, Vladimir
- et al.
Published Web Locationhttps://doi.org/10.1007/s10948-009-0591-5
The crystal lattice of a complex compound may contain a subsystem of ions with each one possessing two close equilibrium positions (double-well structure). For example, the oxygen ions in the cuprates form such a subsystem. In such a situation it is impossible to separate electronic and local vibrational motions. This leads to a large increase in the effective strength of the electron–lattice interaction, which is beneficial for pairing.