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Your search keyword '"Boyarchenkov, A. S."' showing total 2 results
Start Over Author "Boyarchenkov, A. S." Topic antiferromagnetism
2 results on '"Boyarchenkov, A. S."'

1. Real-Space Renormalization Group Study of the Anisotropic Antiferromagnetic Heisenberg Model of Spin S = 1 on a Honeycomb Lattice

Author

Boyarchenkov, A. S., Ovchinnikov, A. S., Bostrem, I. G., Baranov, N. V., Hosokoshi, Y., and Inoue, K.

Subjects
ANISOTROPY, RENORMALIZATION, TEMPERATURE MEASUREMENT, MAGNETIZATION, PHASE DIAGRAMS, ANTIFERROMAGNETIC EXCHANGE, HONEYCOMB STRUCTURES, HONEYCOMB LATTICE, CRYSTAL LATTICES, ANTIFERROMAGNETISM, GROUND STATE, HEISENBERG MODEL, Condensed Matter::Strongly Correlated Electrons, MATHEMATICAL MODELS
Abstract

The real-space renormalization group approach is applied to study critical temperatures of a system consisting of interacting spin chains of spin S = 1, with an inner antiferromagnetic exchange, which form a honeycomb crystal lattice. Using the anisotropic Heisenberg model we calculate the critical temperature as a function of the anisotropic parameter and the ratio of the interchain and intrachain interactions. A comparison our results with those obtained from RSRG calculations for the same model of spin-1/2 on a square lattice is given. © 2005 IOP Publishing Ltd.

Published
2005

2. A Two-Dimensional Heisenberg S = 1 Antiferromagnet with Exchange Interactions of Two Types on a Hexagonal Lattice: RSRG and DMRG Analyses.

Author

Sinitsyn, V. E., Boyarchenkov, A. S., Ovchinnikov, A. S., and Bostrem, I. G.

Subjects
*ANISOTROPY, *CRYSTALLOGRAPHY, *LATTICE theory, *QUANTUM field theory, *ANTIFERROMAGNETISM, *PHYSICS
Abstract

An anisotropic Heisenberg spin S = 1 model on a two-dimensional hexagonal lattice (formed from interacting chains) with antiferromagnetic nearest-neighbor interactions of two types is analyzed by the real space renormalization group method. The problem of the influence of interchain pairing on the critical properties of the model is studied, and the phase diagram of the model is constructed. The two-dimensional density matrix renormalization group algorithm is used to calculate the ground state energy for the isotropic case as a function of the ratio between interchain and intrachain interactions. © 2005 Pleiades Publishing, Inc. [ABSTRACT FROM AUTHOR]

Published
2005
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