101 citations · 504 across the 50 of their papers we have counts for
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Self-localization of magnons and magnetoroton in a binary Bose-Einstein condensate
S. V. Andreev, O. I. Utesov
We consider a two-component Bose-condensed mixture characterized by positive s-wave scattering lengths. We assume equal densities and intra-species interactions. By doing the Bogol…
Spiral plane flops in frustrated helimagnets in external magnetic field
O. I. Utesov, A. V. Syromyatnikov
We discuss theoretically frustrated Heisenberg spiral magnets in magnetic field . We demonstrate that small anisotropic spin interactions (single-ion biaxial anisotropy or d…
Control of multiferroic order by magnetic field in frustrated helimagnet MnI. Theory
O. I. Utesov, A. V. Syromyatnikov
We provide a theoretical description of frustrated multiferroic with a spiral magnetic ordering in magnetic field . We demonstrate that subtle interplay of excha…
Raman spectra of nanoparticles: elasticity theory-like approach for optical phonons
O. I. Utesov, A. G. Yashenkin, S. V. Koniakhin
A simple way to investigate theoretically the Raman spectra (RS) of nonpolar nanoparticles is proposed. For this aim we substitute the original lattice optical phonon eigenproblem…
Novel approach to Raman spectra of nanoparticles
S. V. Koniakhin, O. I. Utesov, I. N. Terterov +3
In crystalline nanoparticles the Raman peak is downshifted with respect to the bulk material and has asymmetric broadening. These effects are straightly related to the finite size…