One-hole spectral densities in the polarized t - J model

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.8005· OSTI ID:5535862

Hallberg, K; Rojo, A G; Balseiro, C A ^[1]

---

1. Centro Atomico Bariloche and Instituto Balseiro, 8400 San Carlos de Bariloche, Argentina (AR)

We study the dynamics of one hole in the polarized {ital t}-{ital J} model. The model describes the physics of holes in polarized antiferromagnetic systems and the one-particle excitations in strong-coupling superconductors as well. The spectral densities of a single hole are calculated numerically using exact diagonalization of small clusters with toroidal boundary conditions. The quasiparticle spectrum is analyzed in detail. We show that a coherent quasiparticle peak is well defined for {ital J}/{ital t}{gt}0.2. The dispersion relation of the quasiparticle is obtained for different magnetizations. The results are used to discuss the characteristics of one-particle excitations in small-coherence-length superconductors.

• OSTI ID: 5535862
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:10; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENCE LENGTH
CRYSTAL MODELS
DIMENSIONS
DISPERSION RELATIONS
FUNCTIONS
HIGH-TC SUPERCONDUCTORS
HOLES
LENGTH
MATHEMATICAL MODELS
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
SUPERCONDUCTORS