Zobrazeno 1 - 10
of 255
pro vyhledávání: '"Panov, Yu."'
Publikováno v:
Physics of the Solid State. 2024. V. 66. No. 7. P. 1014-1018
Rare-earth orthonickelates RNiO3 are Jahn-Teller magnets, unstable with respect to the anti-Jahn-Teller disproportionation reaction with the formation of a system equivalent to a system of effective spin-triplet composite bosons moving in a non-magne
Externí odkaz:
http://arxiv.org/abs/2411.12613
Autor:
Yasinskaya, D. N., Panov, Yu. D.
We consider a system of Ising spins s=1/2 with nonmagnetic impurities with charge associated with pseudospin S=1. The charge density is fixed pursuant to the concentration n. Analysis of the thermodynamic properties in the one-dimensional case showed
Externí odkaz:
http://arxiv.org/abs/2401.15087
Autor:
Moskvin, A. S., Panov, Yu. D.
Publikováno v:
Phys. Solid State 65 (2023) 1081
We argue that the unusual properties of a wide class of materials based on Jahn-Teller 3d and 4d ions with different crystal and electronic structures, from quasi-two-dimensional unconventional superconductors (cuprates, nickelates, ferropnictides/ch
Externí odkaz:
http://arxiv.org/abs/2401.11028
Autor:
Moskvin, A. S., Panov, Yu. D.
Publikováno v:
J Supercond Nov Magn (2019) 32, 61
We introduce a minimal model to describe the charge degree of freedom in cuprates with the on-site Hilbert space reduced to only the three valence states CuO$_4^{7-,6-,5-}$ (nominally Cu$^{1+,2+,3+}$) and make use of the S=1 pseudospin formalism. The
Externí odkaz:
http://arxiv.org/abs/2301.11951
Publikováno v:
V.V. Konev, V.A. Ulitko, D.N. Yasinskaya et al. Phys. Solid State 60, 2132-2134 (2018)
It is demonstrated in the (pseudo)spin S=1 formalism that the structure of antiphase domain boundaries in the phase of charge ordering of a mixed-valence system of the Cu1+, 2+, 3+ "triplet" type in cuprates on a two-dimensional square lattice depend
Externí odkaz:
http://arxiv.org/abs/2301.11876
Publikováno v:
Panov, Y. D., Ulitko, V. A., Budrin, K. S., Yasinskaya, D. N., & Chikov, A. A. (2019). Competition between the Spin and Pseudospin Subsystems in a Model Cuprate. Physics of the Solid State, 61, 707-713
The competition between the magnetic and charge orderings in a model cuprate is considered in terms of a simplified static 2D spin-pseudospin model. This model is equivalent to the 2D dilute antiferromagnetic (AFM) Ising model with charged impurities
Externí odkaz:
http://arxiv.org/abs/2301.11853
Autor:
Shadrin, A. V., Panov, Yu. D.
We consider the effects of the magnetic field on the frustrated phase states of the dilute Ising chain, especially, the behavior of the magnetic entropy change and the isentropic dependence of the temperature on the magnetic field, which are the key
Externí odkaz:
http://arxiv.org/abs/2301.11794
This paper is devoted to computational algorithms designed to describe the classical Ising magnet in some specific cases when an additional macroscopic restriction in form of constant charge density exists in the system. We developed and implemented
Externí odkaz:
http://arxiv.org/abs/2301.11735
A classical Monte Carlo algorithm based on the quasi-classical approximation is applied to the pseudospin Hamiltonian of the model cuprate. The model takes into account both local and non-local correlations, Heisenberg spin-exchange interaction, sing
Externí odkaz:
http://arxiv.org/abs/2301.11708
Autor:
Moskvin, A. S., Panov, Yu. D.
We develop a minimal non-BCS model for the CuO$_2$ planes with the on-site Hilbert space reduced to only three effective valence centers CuO$_4$ with different charge, conventional spin, and orbital symmetry, combined in a charge triplet. Using the S
Externí odkaz:
http://arxiv.org/abs/2111.01653