Abstract
The possibility of long-period (``superlattice'') ground states is systematically investigated in a commensurate (3/4-filled), one-dimensional two-band Peierls-Hubbard Hamiltonian. This model has been proposed to describe halogen-bridged mixed-valence linear-chain compounds and is a one-dimensional analog of a Hamiltonian proposed to model cuprate and bismuthate oxide superconductors. Conventional superlattice phases are driven by competing length scales (for example, from incommensurate filling or an external incommensurate potential). However, these long-period ground states are intrinsic to a competition between long-range repulsive Coulomb forces and the attractive on-site electron-phonon interaction, even at exactly 3/4 filling where a period of four lattice constants might be naively expected by Peierls's argument.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
