Gain of the kinetic energy of bipolarons in thet−J-Holstein model based on electron-phonon coupling

2010/08/19 by Lev Vidmar, J. Bonča, Janez Bonca · 7 citations
Chemistry · Materials Science · Physics and Astronomy · #Activation energy #Advanced Condensed Matter Physics #Bipolaron #Chemistry #Condensed matter physics #Electron #Kinetic energy #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Physical chemistry #Physics #Physics of Superconductivity and Magnetism #Polaron #Quantum mechanics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.82.125121

published in Physical Review B 82(12) (American Physical Society) · 6 pages, 4 figures

arxiv created 2010/08/19 · openalex publication_date 2010/09/22 · arxiv updated 2010/09/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

With increasing electron-phonon coupling as described within the t\text\ensuremath-J-Holstein model, bipolaron kinetic energy is lowered in comparison with that of the polaron. This effect is accompanied with ``undressing'' of bipolaron from lattice degrees of freedom. Consequently, the effective bipolaron mass becomes smaller than the polaron mass. Magnetic as well as lattice degrees of freedom cooperatively contribute to formation of spin-lattice bipolarons.

Citations

• Optical integral and sum-rule violation in high-Tcsuperconductors
• In-plane optical spectral weight transfer in optimally dopedBi2Sr2Ca2Cu3O10
• Bipolarons in the extended Holstein Hubbard model
• Kinetic energy driven superconductivity and the pseudogap phase in weakly doped antiferromagnets