Heisenberg antiferromagnet on a compressible square lattice

Journal Article · Sun May 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.12176· OSTI ID:5007359

Saenger, D U ^[1]

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1. Institut fuer Theoretische Physik, Universitaet des Saarlandes, D-66041 Saarbruecken (Germany)

The damping of spin waves due to spin-phonon interaction in a spin-[ital S] Heisenberg antiferromagnet on a square lattice is calculated. The theory applies to the regimes where the sound velocities [ital v][sub [ital s]] are small compared with magnon velocities [ital v][sub [ital m]], which is the case in antiferromagnetic high-[ital T][sub [ital c]] superconductor basis materials like YaBa[sub 2]Cu[sub 3]O[sub 6], and [bold k][xi][much gt]1, where [bold k] and [xi] are wave vector and correlation length, respectively. It is concluded that the broad spectral feature of the two-magnon line observed in layered perovskites can be explained qualitatively as a consequence of spin-phonon interaction.

• OSTI ID: 5007359
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665400* -- Quantum Physics Aspects of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
COPPER COMPOUNDS
CRYSTAL MODELS
CUPRATES
DAMPING
FUNCTIONS
HEISENBERG MODEL
HIGH-TC SUPERCONDUCTORS
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
SPECTRAL FUNCTIONS
SPIN WAVES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS