Spin dynamics of SrCu{sub 2}O{sub 3} and the Heisenberg ladder

Journal Article · Thu Feb 01 00:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.R2934· OSTI ID:278753

Sandvik, A W; Dagotto, E ^[1]; Scalapino, D J ^[2]

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1. National High Magnetic Field Laboratory and Physics Department, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32306 (United States)
2. Department of Physics, University of California, Santa Barbara, California 93106 (United States)

The {ital S}=1/2 Heisenberg antiferromagnet in the ladder geometry is studied as a model for the spin degrees of freedom of SrCu{sub 2}O{sub 3}. The susceptibility and the spin-echo decay rate are calculated using a quantum Monte Carlo technique, and the spin-lattice relaxation rate is obtained by maximum-entropy analytic continuation of imaginary-time correlation functions. All calculated quantities are in reasonable agreement with experimental results for SrCu{sub 2}O{sub 3} if the exchange coupling {ital J}{approx_equal}850 K. However, for the susceptibility fit an anomalously low factor is required. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG03-85ER45197
• OSTI ID: 278753
• Journal Information: Physical Review, B: Condensed Matter, Vol. 53, Issue 6; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CUPRATES
ANTIFERROMAGNETISM
SPIN-LATTICE RELAXATION
STRONTIUM OXIDES
COMPUTERIZED SIMULATION
HEISENBERG MODEL
HIGH-TC SUPERCONDUCTORS
MONTE CARLO METHOD
SPIN ECHO
SPIN EXCHANGE