6533b853fe1ef96bd12abfe5
RESEARCH PRODUCT
Dielectric relaxation and conductivity in ferroelectric perovskites
Mario Maglionesubject
Condensed Matter::Quantum GasesMaterials scienceCondensed matter physicsExcitonDielectricConductivityCondensed Matter PhysicsPolaronFerroelectricitySpace chargeElectronic Optical and Magnetic MaterialsCondensed Matter::Materials SciencePolarizabilityCondensed Matter::Strongly Correlated ElectronsQuantum fluctuationdescription
Abstract Ferroelectric ABO3 perovskites are usually well known for their high dielectric susceptibility. Under selected impurity substitutions their conductivity may be strongly increased. The interaction between electronic conductivity and lattice polarizability may take place over different length scales. At high temperatures (T > 300 K), this interaction length is macroscopic leading to space charges. At low temperatures (T < 50 K), the polaronic interaction is restricted to a few unit cells. In the special case of SrTiO3, these polaronic excitons are sensitive to the quantum fluctuations which lead to the new concept of quantum polarons.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-02-01 | Ferroelectrics |