101 citations · 504 across the 50 of their papers we have counts for
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Thermodynamically stable skyrmion lattice in tetragonal frustrated antiferromagnet with dipolar interaction
Oleg I. Utesov
Motivated by recent experimental results on GdRuSi [Khanh, N.D., Nakajima, T., Yu, X. et al., \emph{Nat. Nanotechnol.} \textbf{15}, 444-449 (2020)], where nanometric square…
Phase competition in frustrated anisotropic antiferromagnet in strong magnetic field
O. I. Utesov, A. V. Syromyatnikov
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 magnet…
Lifetimes of Confined Optical Phonons and the Shape of a Raman Peak in Disordered Nanoparticles: II. Numerical Treatment
Sergei V. Koniakhin, Oleg I. Utesov, Andrey G. Yashenkin
Disorder-induced broadening of optical vibrational eigenmodes in nanoparticles of nonpolar crystals is studied numerically. The methods previously used to treat phonons in defectle…
Self-consistent T-matrix approach to gap renormalization in quantum magnets with bond disorder
Oleg I. Utesov
Based on the self-consistent T-matrix approximation (SCTMA), analytical theory of density of states (DOS) in three-dimensional quantum magnets with the bond disorder is proposed. I…
Lifetimes of Confined Optical Phonons and the Shape of a Raman Peak in Disordered Nanoparticles: I. Analytical Treatment
Oleg I. Utesov, Andrey G. Yashenkin, Sergei V. Koniakhin
Microscopic description of Raman spectra in nanopowders of nonpolar crystals is accomplished by developing the theory of disorder-induced broadening of optical vibrational eigenmod…
Bench tests for microscopic theory of Raman scattering in powders of disordered nonpolar crystals: nanodiamonds and Si nanoparticles
Andrey G. Yashenkin, Oleg I. Utesov, Sergei V. Koniakhin
Recent Raman data on diamond and crystalline Si nanopowders are analyzed with the use of a microscopic theory of Raman scattering in ensembles of disordered nonpolar nanocrystals.…
Metastable solitonic states in the strained itinerant helimagnet FeGe
Victor Ukleev, Yuichi Yamasaki, Oleg Utesov +5
The tensile strain is a promising tool for creation and manipulation of magnetic solitonic textures in the chiral helimagnets via tunable control of magnetic anisotropy and Dzyalos…
Magnon spectrum and electron spin resonance in antiferromagnet with large single-ion easy plane anisotropy
Artemiy S. Sherbakov, Oleg I. Utesov
Motivated by recent experiments on quantum magnet NiCl-4SC(NH) (DTN) and its Br-doped counterpart DTNX we propose a theoretical description of optical magnon bran…