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

Journal Article · Mon May 31 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.3498· OSTI ID:6496120

Roeder, H; Bishop, A R; Tinka Gammel, J ^[1]

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1. Physikalishes Instituet, Universitaet Bayreuth, W-8580 Bayreuth (Germany) Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Materials Research Branch, NCCOSC RDT E Division (NRaD), San Diego, California 92152-5000 (United States)

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.

• OSTI ID: 6496120
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:22; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
665430 -- Other Topics in Quantum Fluids & Solids-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
COUPLING CONSTANTS
CRYSTAL MODELS
DIAGRAMS
ELECTRON-ELECTRON INTERACTIONS
ELECTRON-PHONON COUPLING
ENERGY LEVELS
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
SUPERCONDUCTORS