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dc.contributor.author |
Chitov, G.Y. |
|
dc.contributor.author |
Gros, C. |
|
dc.date.accessioned |
2017-06-15T13:14:06Z |
|
dc.date.available |
2017-06-15T13:14:06Z |
|
dc.date.issued |
2005 |
|
dc.identifier.citation |
Ordering in two-dimensional Ising models with competing
interactions / G.Y. Chitov, C. Gros // Физика низких температур. — 2005. — Т. 31, № 8-9. — С. 952-967. — Бібліогр.: 33 назв. — англ. |
uk_UA |
dc.identifier.issn |
0132-6414 |
|
dc.identifier.other |
PACS: 71.10.Fd, 71.10.Hf, 75.30.Et, 64.60.–i |
|
dc.identifier.uri |
http://dspace.nbuv.gov.ua/handle/123456789/121690 |
|
dc.description.abstract |
We study the 2D Ising model on a square lattice with additional non-equal diagonal next-nearest
neighbor interactions. The cases of classical and quantum (transverse) models are considered.
Possible phases and their locations in the space of three Ising couplings are analyzed. In particular,
incommensurate phases occurring only at non-equal diagonal couplings, are predicted. We also analyze
a spin-pseudospin model comprised of the quantum Ising model coupled to XY spin chains in
a particular region of interactions, corresponding to the Ising sector’s super-antiferromagnetic
(SAF) ground state. The spin-SAF transition in the coupled Ising-XY model into a phase with
co-existent SAF Ising (pseudospin) long-range order and a spin gap is considered. Along with destruction
of the quantum critical point of the Ising sector, the phase diagram of the Ising-XY
model can also demonstrate a re-entrance of the spin-SAF phase. A detailed study of the latter is
presented. The mechanism of the re-entrance, due to interplay of interactions in the coupled
model, and the conditions of its appearance are established. Applications of the spin-SAF theory
for the transition in the quarter-filled ladder compound NaV₂O₅ are discussed. |
uk_UA |
dc.description.sponsorship |
We are grateful to D.I. Khomskii, E. Orignac, and
P.N. Timonin for helpful discussions. This work is
supported by the German Science Foundation. G.Y.C.
also acknowledges support from a LURF grant. |
uk_UA |
dc.language.iso |
en |
uk_UA |
dc.publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
uk_UA |
dc.relation.ispartof |
Физика низких температур |
|
dc.subject |
К семидесятилетию антиферромагнетизма |
uk_UA |
dc.title |
Ordering in two-dimensional Ising models with competing interactions |
uk_UA |
dc.type |
Article |
uk_UA |
dc.status |
published earlier |
uk_UA |
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