Spectral function of a hole in the t - J model

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.2414· OSTI ID:5279733

Liu, Z; Manousakis, E ^[1]

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1. Department of Physics, Center for Materials Research and Technology Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida (USA)

We give numerical solutions, on finite but large-size square lattices, of the equation for the single-hole Green's function obtained by the self-consistent approach of Schmitt-Rink {ital et} {ital al}. and Kane {ital et} {ital al}. The spectral function of the hole in a quantum antiferromagnet shows that most features describing the hole motion are in close agreement with the results of the exact diagonalization on the 4{sup 2} lattice in the region of {ital J}/{ital t}{le}0.2. Our results obtained on sufficiently large-size lattices suggest that certain important features of the spectral function survive in the thermodynamic limit while others change due to finite-size effects. We find that the leading nonzero vertex correction is given by a two-loop diagram, which has a small contribution.

• OSTI ID: 5279733
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 44:5; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
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COPPER OXIDES
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ANTIFERROMAGNETIC MATERIALS
GREEN FUNCTION
HEISENBERG MODEL
HIGH-TC SUPERCONDUCTORS
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CALCIUM COMPOUNDS
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CRYSTALS
FUNCTIONS
MAGNETIC MATERIALS
MAGNETISM
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MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
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