Numerical investigation of competing spin-spin interactions in a two-dimensional Ising model for La/sub 2/. sqrt. /sub z/CuO/sub 4/. sqrt. /sub y/

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.9359· OSTI ID:7150558

Fay, D; Klemm, R A; Monien, H

We have investigated numerically the model of Klemm, Thomann, and Johnston for La/sub 2/..sqrt../sub z/CuO/sub 4/..sqrt../sub y/. We assume for computational simplicity that the orthorhombic symmetry-breaking energy is large, implying Ising-like spin interactions predominate. Monte Carlo calculations suggest that the ground states exhibit quasi-long-range order in the orthorhombic c-axis direction, but are frustrated (or incommensurate) in the a-axis direction. The excited states often exhibit triplet pairs of spins that are flipped relative to the ground state.

• Research Organization: Abteilung fuer Theoretische Festkoerperphysik, Universitaet Hamburg, Jungiusstrasse 11, 2000 Hamburg 36, West Germany
• OSTI ID: 7150558
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 37:16
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER OXIDES
ISING MODEL
LANTHANUM OXIDES
SPIN-SPIN RELAXATION
EXCITED STATES
GROUND STATES
HAMILTONIANS
ORDER PARAMETERS
ORTHORHOMBIC LATTICES
SUPERCONDUCTORS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
ENERGY LEVELS
LANTHANUM COMPOUNDS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
RELAXATION
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity