Ground state and excitations of a one-dimensional two-band supersymmetric t - J model with crystalline field splitting

Journal Article · Mon Oct 19 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.2396· OSTI ID:7196910

Schlottmann, P ^[1]

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1. Department of Physics and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306 (United States)

We consider a one-dimensional two-band model of electrons on a lattice with nearest-neighbor hopping {ital t} constrained by the excluded multiple occupancy of the sites, an interband splitting, {Delta}, and intraband and interband exchange {ital J} between neighboring sites. This model is integrable at the supersymmetric point and reduces to the SU(4)-invariant supersymmetric {ital t}-{ital J} model with crystal field splitting. We present the exact solution via Bethe's ansatz and discuss ground-state properties and the excitation spectrum as a function of {Delta}.

• DOE Contract Number: FG05-91ER45443
• OSTI ID: 7196910
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:16; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

665000* -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-ELECTRON INTERACTIONS
ELECTRONIC STRUCTURE
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCHANGE INTERACTIONS
EXCITATION
GROUND STATES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
ONE-DIMENSIONAL CALCULATIONS
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
SUPERSYMMETRY
SYMMETRY