Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Dudka, M."'
Publikováno v:
Phys. Rev. E 106, 034123 (2022)
We have studied the critical properties of the three-dimensional random anisotropy Heisenberg model by means of numerical simulations using the Parallel Tempering method. We have simulated the model with two different disorder distributions, cubic an
Externí odkaz:
http://arxiv.org/abs/2112.13461
Autor:
Dudka, M., Fedorenko, A. A.
Publikováno v:
Condens. Matter Phys., 2017, vol. 20, No. 1, 13603
We study the critical behavior of the 2D $N$-color Ashkin-Teller model in the presence of random bond disorder whose correlations decays with the distance $r$ as a power-law $r^{-a}$. We consider the case when the spins of different colors sitting at
Externí odkaz:
http://arxiv.org/abs/1702.04340
Publikováno v:
Phys. Rev. B 93, 094301 (2016)
The scaling behavior of model C describing the dynamical behaviour of the $n$-component nonconserved order parameter coupled statically to a scalar conserved density is considered in $d$-dimensional space. Conditions for the realization of different
Externí odkaz:
http://arxiv.org/abs/1602.01326
Publikováno v:
Phys. Rev. B 93, 064405 (2016)
A functional renormalization group approach to $d$-dimensional, $N$-component, non-collinear magnets is performed using various truncations of the effective action relevant to study their long distance behavior. With help of these truncations we stud
Externí odkaz:
http://arxiv.org/abs/1510.00169
Autor:
Dudka, M.
Publikováno v:
J. Math. Phys. 56, 013302 (2015)
Two-loop massive Feynman integrals for $\phi^4$ field-theoretical model with long-range correlated disorder are considered. Massive integrals for the vertex function $\Gamma^{(4)}$ including two or three massless propagators for generic space dimensi
Externí odkaz:
http://arxiv.org/abs/1408.5863
Publikováno v:
Condens. Matter Phys., 2012, vol. 15, No. 4, 43001:1-10
The field-theoretical model describing multicritical phenomena with two coupled order parameters with n_{||} and n_{\perp} components and of O(n_{||}) \oplus O(n_{\perp}) symmetry is considered. Conditions for realization of different types of multic
Externí odkaz:
http://arxiv.org/abs/1206.3853
Publikováno v:
Condens. Matter Phys., 2010, vol. 13, No. 4, 43703:1-16
The effectiveness of the perturbative renormalization group approach at fixed space dimension d in the theory of critical phenomena is analyzed. Three models are considered: the O(N) model, the cubic model and the antiferromagnetic model defined on t
Externí odkaz:
http://arxiv.org/abs/1012.3739
Publikováno v:
Phys.Rev.B82:104432,2010
We show that the critical behaviour of two- and three-dimensional frustrated magnets cannot reliably be described from the known five- and six-loops perturbative renormalization group results. Our conclusions are based on a careful re-analysis of the
Externí odkaz:
http://arxiv.org/abs/1009.1492
Publikováno v:
J. Phys. A: Math. Gen., vol. 40 (2007) 8247-8264
We study the relaxational critical dynamics of the three-dimensional random anisotropy magnets with the non-conserved n-component order parameter coupled to a conserved scalar density. In the random anisotropy magnets the structural disorder is prese
Externí odkaz:
http://arxiv.org/abs/0704.0896
The critical dynamics of superconductors in the charged regime is reconsidered within field-theory. For the dynamics the Ginzburg-Landau model with complex order parameter coupled to the gauge field suggested earlier [Lannert et al. Phys. Rev. Lett.
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612643