Electron-Phonon Driven Spin Frustration in Multi-Band Hubbard Models: MX Chains and Oxide Superconductors

Abstract

We discuss the consequence of both electron-phonon and electron- electron couplings in 1D and 2D multiband (Peierls- Hubbard) model. After briefly discussing various analytic limits, we focus on (Hartree- Fock and exact) numerical studies in the intermediate regime for both couplings, where unusual spin-Peierls as well as long-period, states are found. Doping into such phases or near the phase boundaries can lead to further interesting phenomena such as separation of spin and charge, a dopant-induced phase transition of the global (parent) phase, or, real-space ('bipolaronic') pairing. We discuss possible experimentally observable consequences of this rich phase diagram for halogen-bridged transition metal, linear chain complexes (MX chains) in 1D and the oxide superconductors in 2D. Electron-phonon, Electron-electron couplings, Bipolaronic, Halogen-bridged.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1993
Accession Number
ADA264688

Entities

People

  • A. R. Bishop
  • Akrati Saxena
  • H. Roder
  • J. T. Gammel
  • K. Yonemitsu

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Competition
  • Couplings
  • Crystal Lattices
  • Crystal Structure
  • Diagrams
  • Distortion
  • Electronic Materials
  • Ground State
  • Lattice Dynamics
  • Magnetic Fields
  • Materials
  • Materials Science
  • Ocean Surveillance
  • Phase
  • Phase Diagrams
  • Superconductors
  • Surveillance

Fields of Study

  • Physics

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Space