Magnetic order and spin excitations in the Kitaev–Heisenberg model on a honeycomb lattice

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S106377611606008X· OSTI ID:22617243

Vladimirov, A. A. ^[1]; Ihle, D. ^[2]

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1. Joint Institute for Nuclear Research (Russian Federation)
2. Universität Leipzig, Institut für Theoretische Physik (Germany)

We consider the quasi-two-dimensional pseudo-spin-1/2 Kitaev–Heisenberg model proposed for A{sub 2}IrO{sub 3} (A = Li, Na) compounds. The spin-wave excitation spectrum, the sublattice magnetization, and the transition temperatures are calculated in the random phase approximation for four different ordered phases observed in the parameter space of the model: antiferromagnetic, stripe, ferromagnetic, and zigzag phases. The Néel temperature and temperature dependence of the sublattice magnetization are compared with the experimental data on Na{sub 2}IrO{sub 3}.

• OSTI ID: 22617243
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 122, Issue 6; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
COMPARATIVE EVALUATIONS
EXCITATION
HEISENBERG MODEL
IRIDIUM COMPOUNDS
LITHIUM COMPOUNDS
MAGNETIZATION
OXYGEN COMPOUNDS
RANDOM PHASE APPROXIMATION
RANDOMNESS
SODIUM COMPOUNDS
SPECTRA
SPIN
SPIN WAVES
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL SYSTEMS