Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Taras Krokhmalskii"'
Publikováno v:
The European Physical Journal B. 96
We apply the rotation-invariant Green's function method to study the finite-temperature properties of a $S{=}1/2$ sawtooth-chain (also called $\Delta$-chain) antiferromagnetic Heisenberg model at the fully frustrated point when the exchange couplings
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda777aa9e8150ec67e1f752e2d5c947
https://doi.org/10.1140/epjb/s10051-023-00521-2
https://doi.org/10.1140/epjb/s10051-023-00521-2
Autor:
Maksym Druchok, Volodymyr Krasnov, Taras Krokhmalskii, Tatiana Cardoso e Bufalo, Sergio Martins de Souza, Onofre Rojas, Oleg Derzhko
Recently, X.Ma et al. [Phys. Rev. Lett. 118, 027402 (2017)] have suggested that water molecules encapsulated in (6,5) single-wall carbon nanotube experience a temperature-induced quasiphase transition around 150 K interpreted as changes in the water
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e50c878939a4cce6b63445bffe1e73e
Publikováno v:
The European Physical Journal B. 95
We apply the rotation-invariant Green's function method (RGM) to study the spin $S=1/2$ Heisenberg model on a one-dimensional sawtooth lattice, which has two nonequivalent sites in the unit cell. We check the RGM predictions for observable quantities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04444855158307985bf910adacaf455b
https://doi.org/10.1140/epjb/s10051-022-00359-0
https://doi.org/10.1140/epjb/s10051-022-00359-0
Publikováno v:
Physical Review B. 102
We consider the spin-$\frac{1}{2}$ isotropic XY chain in an external magnetic field directed along the $z$ axis with periodically varying $g$ factors. To reveal the effects of regularly alternating $g$ factors, we calculate various static and dynamic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31b6297a1af47afef2104004adf6fd70
https://doi.org/10.1103/physrevb.102.144403
https://doi.org/10.1103/physrevb.102.144403
Publikováno v:
Physical Review B
The spin-half pyrochlore Heisenberg antiferromagnet (PHAF) is one of the most challenging problems in the field of highly frustrated quantum magnetism. Stimulated by the seminal paper of M.~Planck [M.~Planck, Verhandl. Dtsch. phys. Ges. {\bf 2}, 202-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2050379c49ced9a3923e44917a3872b3
https://hdl.handle.net/21.11116/0000-0006-E2C0-121.11116/0000-0006-E2C2-F
https://hdl.handle.net/21.11116/0000-0006-E2C0-121.11116/0000-0006-E2C2-F
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 573:125986
We discuss the origin of an enigmatic low-temperature behavior of one-dimensional decorated spin systems which was coined the pseudo-transition. Tracing out the decorated parts results in the standard Ising-chain model with temperature-dependent para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76a931266cf77095a621c29dcf5dec66
https://doi.org/10.1016/j.physa.2021.125986
https://doi.org/10.1016/j.physa.2021.125986
Publikováno v:
Physics Letters A. 387:127020
Recently, a surprising low-temperature behavior has been revealed in a two-leg ladder Ising model with trimer rungs (Weiguo Yin, arXiv:2006.08921). Motivated by these findings, we study this model from another perspective and demonstrate that the rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee6601a780e654299e6c910db35ead72
https://doi.org/10.1016/j.physleta.2020.127020
https://doi.org/10.1016/j.physleta.2020.127020
Publikováno v:
Physical Review B. 97
The search for flat-band solid-state realizations is a crucial issue to verify or to challenge theoretical predictions for quantum many-body flat-band systems. For frustrated quantum magnets flat bands lead to various unconventional properties relate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dea5748c5d4ee636c86031d5d2b2ec3d
https://doi.org/10.1103/physrevb.97.024405
https://doi.org/10.1103/physrevb.97.024405
Publikováno v:
Condensed Matter Physics
Condensed Matter Physics, Vol 21, Iss 3, p 33705 (2018)
Condensed Matter Physics, Vol 21, Iss 3, p 33705 (2018)
We consider the pyrochlore-lattice quantum Heisenberg ferromagnet and discuss the properties of this spin model at arbitrary temperatures. To this end, we use the Green's function technique within the random-phase (or Tyablikov) approximation as well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afcb5e881f19d3346bc7115bceb57d81
http://dspace.nbuv.gov.ua/handle/123456789/157458
http://dspace.nbuv.gov.ua/handle/123456789/157458
Publikováno v:
Journal of Magnetism and Magnetic Materials. 379:39-44
We consider the antiferromagnetic spin-1/2 $XXZ$ Heisenberg model on a frustrated diamond-chain lattice in a $z$- or $x$-aligned external magnetic field. We use the strong-coupling approach to elaborate an effective description in the low-temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d96a5c2124bd85b760046b087f407f45
https://doi.org/10.1016/j.jmmm.2014.11.082
https://doi.org/10.1016/j.jmmm.2014.11.082