Spin-Peierls ground states and frustration in a multiband Peierls-Hubbard model

We discuss the consequences of including both electron-phonon and electron-electron couplings in multiband models, focusing on numerical studies of a one-dimensional two-band model in the intermediate regime for both coupling strengths. Spin-Peierls as well as long-period, frustrated ground states a...

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Bibliographic Details
Published in:Physical review letters 1993-05, Vol.70 (22), p.3498-3501
Main Authors: RÖDER, H, BISHOP, A. R, GAMMEL, J. T
Format: Article
Language:English
Subjects:
665430 > Other Topics in Quantum Fluids & Solids-- (1992-)
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
COUPLING
COUPLING CONSTANTS
CRYSTAL MODELS
DIAGRAMS
Electron states
ELECTRON-ELECTRON INTERACTIONS
ELECTRON-PHONON COUPLING
ENERGY LEVELS
Exact sciences and technology
GROUND STATES
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICS
NUMERICAL ANALYSIS
ONE-DIMENSIONAL CALCULATIONS
PARTICLE INTERACTIONS
PEIERLS METHOD
PHASE DIAGRAMS
Physics
SUPERCONDUCTORS 665411 > Basic Superconductivity Studies-- (1992-)
Theories and models of many electron systems
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Summary:We discuss the consequences of including both electron-phonon and electron-electron couplings in multiband models, focusing on numerical studies of a one-dimensional two-band model in the intermediate regime for both coupling strengths. Spin-Peierls as well as long-period, frustrated ground states are identified, reminiscent of those found in axial next-nearest-neighbor Ising models. We speculate on experimentally observable signatures of this rich phase diagram.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.70.3498