Ferroelectricity and superconductivity: competing or cooperating phenomena
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Annette Bussmann-Holder
Abstract
The discovery of high temperature superconductivity in layered systems has evoked a heated discussion about the microscopic electron (hole) pairing mechanism. In particular, the proximity of these systems to magnetic phases has been taken as evidence for a purely electronic mechanism. However, structural anomalies and unconventional isotope effects suggest that the lattice plays a crucial role and must be incorporated in modeling the mechanism. Here we show that polarizability effects and Jahn-Teller centers are of special importance, since these enable dynamical charge transfer, interband interactions, polaron and bipolaron formation. In this respect the layered superconductors approach ferroelectrics, where dynamical covalency is known to trigger the structural instability.
© by Oldenbourg Wissenschaftsverlag, Stuttgart, Germany
Articles in the same Issue
- Preface: Advanced Ferroelectrics: Structure and Properties
- Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics
- Spontaneous and induced surface piezoresponse in PbMg1/3Nb2/3O3 single crystals
- Diffuse scattering and local structure modeling in ferroelectrics
- Transformation processes in relaxor ferroelectric PbSc0.5Ta0.5O3 heavily doped with Nb and Sn
- Temperature-dependent synchrotron powder diffraction phase studies of (K0.37Na0.52Li0.03)(Nb0.87Ta0.1Sb0.03)O3 ferroelectric ceramics
- Polar states of the impurity system KTaO3:Li
- Neutron total scattering studies on A-site disorder in lead-free ferroelectric Bi0.5(Na1–xKx)0.5TiO3
- In situ neutron diffraction study of electric field induced structural transitions in lanthanum doped lead zirconate titanate
- A brief review on the model antiferroelectric PbZrO3 perovskite-like material
- Broadband dielectric investigations of indium rich CuInP2S6 layered crystals
- Ferroelectricity and superconductivity: competing or cooperating phenomena
- A new computer tool at the Bilbao Crystallographic Server to detect and characterize pseudosymmetry
Articles in the same Issue
- Preface: Advanced Ferroelectrics: Structure and Properties
- Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics
- Spontaneous and induced surface piezoresponse in PbMg1/3Nb2/3O3 single crystals
- Diffuse scattering and local structure modeling in ferroelectrics
- Transformation processes in relaxor ferroelectric PbSc0.5Ta0.5O3 heavily doped with Nb and Sn
- Temperature-dependent synchrotron powder diffraction phase studies of (K0.37Na0.52Li0.03)(Nb0.87Ta0.1Sb0.03)O3 ferroelectric ceramics
- Polar states of the impurity system KTaO3:Li
- Neutron total scattering studies on A-site disorder in lead-free ferroelectric Bi0.5(Na1–xKx)0.5TiO3
- In situ neutron diffraction study of electric field induced structural transitions in lanthanum doped lead zirconate titanate
- A brief review on the model antiferroelectric PbZrO3 perovskite-like material
- Broadband dielectric investigations of indium rich CuInP2S6 layered crystals
- Ferroelectricity and superconductivity: competing or cooperating phenomena
- A new computer tool at the Bilbao Crystallographic Server to detect and characterize pseudosymmetry
