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Title: Superlight bipolarons in High-T{sub c} superconductors

We present numerical results of the recently derived polaronic t-J{sub p} model, which accounts for realistic long range Coulomb repulsion and strong Fröhlich electron-phonon interactions for high temperature superconductivity in doped polar insulators. Different cluster geometries of 18-sites with two particles are studied. It appears that ground state energy decreases with hopping of polarons indicating an increase in tendency of the polarons to couple with each other. The entropy curves show that the system goes to more ordered state with the increase of polaron hopping for all cluster geometries.
Authors:
; ; ;  [1]
  1. Department of Physics, University of Kalyani, Kalyani, West Bengal-741235 (India)
Publication Date:
OSTI Identifier:
22490573
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COULOMB FIELD; DOPED MATERIALS; ELECTRON-PHONON COUPLING; ENTROPY; GROUND STATES; HIGH-TC SUPERCONDUCTORS; POLARONS; SUPERCONDUCTIVITY