Phase diagram of the frustrated spin-1/2 Heisenberg antiferromagnet with cyclic-exchange interaction

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.7889· OSTI ID:7115960

Chubukov, A; Gagliano, E ^[1]; Balseiro, C ^[2]

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1. Physics Department and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
2. Instituto Balseiro and Centro Atomico Bariloche, 8400 San Carlos de Bariloche, Rio Negro (Argentina)

We study the effect of four-spin cyclic-exchange interactions on the magnetic properties of the spin-1/2 Heisenberg antiferromagnetic on a two-dimensional square lattice with the two-spin interactions between nearest and next-nearest neighbors. We found that the four-spin exchange competes with the effects of frustration and this competition leads to a very rich phase diagram. We use the standard spin-wave formalism, the perturbative expansions around various dimerized states and finite-cluster calculations to study the locations of different phases of the model. The phase diagram in the frustration-cyclic exchange plane involves two collinear phases (({pi},{pi}) and (0,{pi})), three canted states, and two different dimerized configurations.

• OSTI ID: 7115960
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 45:14; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
PHASE DIAGRAMS
HEISENBERG MODEL
ANTIFERROMAGNETISM
HIGH-TC SUPERCONDUCTORS
COMPUTERIZED SIMULATION
ELECTRONIC STRUCTURE
PROXIMITY EFFECT
SPIN EXCHANGE
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL MODELS
DIAGRAMS
MAGNETISM
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
SIMULATION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)