Zobrazeno 1 - 10
of 199
pro vyhledávání: '"Syromyatnikov, A. V."'
Cs2CoBr4 is a triangular-lattice antiferromagnet which can be viewed as weakly interacting spin chains due to spatially anisotropic frustrating exchange couplings. The spin-orbit interaction in Co(2+) spin-3/2 ions leads to a strong easy-plane single
Externí odkaz:
http://arxiv.org/abs/2309.02266
We discuss theoretically a ferromagnetic monolayer with an interfacial Dzyaloshinskii-Moriya interaction (iDMI) and a small axial anisotropy. It is shown that the system has a long-period cycloid magnetic order slightly distorted by the anisotropy wh
Externí odkaz:
http://arxiv.org/abs/2308.05283
We study spin dynamics of ordered phases of Cs2CoBr4 in a magnetic field using electron spin resonance (ESR) technique and theoretical analysis. This material hosts weakly interacting distorted-triangular-lattice planes of spin-3/2 Co(2+) ions which
Externí odkaz:
http://arxiv.org/abs/2307.16251
Autor:
Syromyatnikov, A. V.
Publikováno v:
Phys. Rev. B 106, 184415 (2022)
We discuss spin-$\frac12$ $J_1$--$J_2$ model on the triangular lattice using recently proposed bond-operator theory (BOT). In agreement with previous discussions of this system, we obtain four phases upon $J_2$ increasing: the phase with $120^\circ$
Externí odkaz:
http://arxiv.org/abs/2207.12708
Autor:
Syromyatnikov, A. V.
Publikováno v:
Annals of Physics 454, 169342 (2023)
We theoretically discuss dynamical properties of spin-1/2 Heisenberg antiferromagnet on the triangular lattice in magnetic field $\bf H$. We use the recently proposed bond-operator theory which operates with quantum states of the whole magnetic unit
Externí odkaz:
http://arxiv.org/abs/2202.02120
Autor:
Syromyatnikov, A. V.
Publikováno v:
Phys. Rev. B 105, 144414 (2022)
We discuss spin-$\frac12$ Heisenberg antiferromagnet on the triangular lattice using the recently proposed bond-operator technique (BOT). We use the variant of the BOT which takes into account all spin degrees of freedom in the magnetic unit cell con
Externí odkaz:
http://arxiv.org/abs/2107.00256
Publikováno v:
Journal of Magnetism and Magnetic Materials 570, 170540 (2023)
By the example of Heisenberg $d$-dimensional disordered non-frustrated antiferromagnets, we discuss quantum transitions at $d\ge2$ from magnetically ordered (superfluid) to various disorder-induced insulating phases (Bose-glass, Mott-glass, etc.) in
Externí odkaz:
http://arxiv.org/abs/2104.08693
Publikováno v:
Phys. Rev. B 103, 134416 (2021)
We discuss theoretically static and dynamical properties of $XY$ and Heisenberg antiferromagnets on triangular lattice with random vacancies and substitutional spins. It is shown that the distortion of $120^\circ$ magnetic order produced by a single
Externí odkaz:
http://arxiv.org/abs/2101.09511
Autor:
Utesov, O. I., Syromyatnikov, A. V.
We discuss theoretically a frustrated Heisenberg antiferromagnet in magnetic field close to the saturation one. It is demonstrated that a small biaxial anisotropy and/or the magnetic dipolar interaction produce a delicate balance between phases with
Externí odkaz:
http://arxiv.org/abs/2008.04234
Autor:
Syromyatnikov, A. V.
Publikováno v:
Phys. Rev. B 102, 014409 (2020)
We discuss spin-$\frac12$ Heisenberg antiferromagnet on simple square lattice in magnetic field $H$ using recently proposed bond-operator technique. It is well known that magnetically ordered phases of quantum magnets are well described at least qual
Externí odkaz:
http://arxiv.org/abs/2005.07537