| Issue |
EPL
Volume 95, Number 2, July 2011
|
|
|---|---|---|
| Article Number | 27004 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/95/27004 | |
| Published online | 28 June 2011 | |
Theory of high-temperature superconductivity in doped polar insulators
Department of Physics, Loughborough University - Loughborough LE11 3TU, UK, EU
Received:
21
April
2011
Accepted:
31
May
2011
Many high-temperature superconductors are highly polarizable ionic lattices where the Fröhlich electron-phonon interaction (EPI) with longitudinal optical phonons creates an effective attraction of doped carriers virtually equal to their Coulomb repulsion. The general multi-polaron theory is given with both interactions being strong compared with the carrier kinetic energy so that the conventional BCS-Eliashberg approximation is inapplicable. The many-electron system is described by the polaronic t-Jp Hamiltonian with reduced hopping integral, t, allowed double on-site occupancy, large phonon-induced antiferromagnetic exchange, Jp≫t, and a high-temperature superconducting state of small superlight bipolarons protected from clustering.
PACS: 71.38.-k – Polarons and electron-phonon interactions / 72.15.Jf – Thermoelectric and thermomagnetic effects / 74.72.-h – Cuprate superconductors
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.