Perturbative approximation scheme for isolated impurity bonds in the two-dimensional spin-1/2 Heisenberg antiferromagnet

Journal Article · Sun May 15 04:00:00 EDT 1994 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.355679· OSTI ID:7270558

Schlottmann, P ^[1]

---

1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)

An isolated impurity bond of coupling[minus][ital K] replacing a link [ital J] in the spin-1/2 Heisenberg antiferromagnet on a square lattice is considered. A simple perturbative approximation scheme is deviced, in which the two-site cluster formed by the spins linked by the impurity bond is embedded into the linearized spin wave approximation for the antiferromagnet. The resolvent for the local states of the cluster is calculated in three successive levels of approximation. The ground state wave function, the magnetization at the impurity link, and the transverse correlation across the impurity link as a function of the coupling [ital K] are discussed.

• DOE Contract Number: FG05-91ER45443
• OSTI ID: 7270558
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 75:10; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

665400* -- Quantum Physics Aspects of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CALCULATION METHODS
CORRELATIONS
CRYSTAL MODELS
ENERGY LEVELS
FUNCTIONS
GROUND STATES
HEISENBERG MODEL
IMPURITIES
MAGNETISM
MAGNETIZATION
MATHEMATICAL MODELS
PERTURBATION THEORY
SPIN WAVES
TWO-DIMENSIONAL CALCULATIONS
WAVE FUNCTIONS