A5086849823- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Physics of Superconductivity and Magnetism
- Solid-state spectroscopy and crystallography
- Inorganic Chemistry and Materials
- Magnetism in coordination complexes
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Sociopolitical Dynamics in Russia
- Crystal Structures and Properties
- Nuclear materials and radiation effects
- Gas Sensing Nanomaterials and Sensors
- Inorganic Fluorides and Related Compounds
- Advancements in Solid Oxide Fuel Cells
- 2D Materials and Applications
- Metal Extraction and Bioleaching
- Spectroscopy and Laser Applications
- Graphene research and applications
- Night-time city culture
- Topological Materials and Phenomena
- Social and Behavioral Studies
- Arctic and Russian Policy Studies
- Statistical Mechanics and Entropy
- Central Asia Education and Culture
Ural Federal University
2017-2024
Ural Branch of the Russian Academy of Sciences
2024
M.N. Mikheev Institute of Metal Physics
2019-2024
Institute of History
2020-2022
Siberian Branch of the Russian Academy of Sciences
2022
Russian Academy of Sciences
2020
The tetradymite compound BiSbTeSe$_2$, is one of the most bulk-insulating three-dimensional topological insulators, which makes it important in insulator research. It a member solid-solution system Bi$_{2-x}$Sb$_x$Te$_{3-y}$Se$_y$, for local crystal structure, such as occupation probabilities each atomic site, not well understood. We have investigated temperature and polarization dependent spontaneous Raman scattering revealing much higher number lattice vibrational modes than predicted by...
The magnon dispersion of ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ has been studied by polarized and unpolarized neutron scattering experiments on crystals containing 0, 1, 10% Ti. Ti is inserted in order to enable the growth large, partially detwinned crystals. One percent a negligible impact structural magnetic properties. Also for content properties still change very little, but insulating phase stabilized up at least 700 K distortions are reduced. full transverse magnons 1% substitution can...
First-principles calculations and a model consideration of magnetically frustrated layered material PdCrO$_2$ are performed. The results on the exchange parameters in agreement with experimental data Curie-Weiss temperature ($\theta$). We show that experimentally observed strong suppression N\'eel ($T_N$) comparison is due to three main factors. First, as expected, this connected structure relatively small interaction along $c$ axis. Second, deformation ideal in-plane 120$^{\circ}$ magnetic...
Ruthenium is a unique metal that can admit valence states from $\ensuremath{-}2$ to $+8$. In particular, Ru${}^{3+}$ one of the best known Kitaev magnets, Ru${}^{4+}$ dimerizes forming covalent-bond fluid, while Ru${}^{5+}$ in SrRu${}_{2}$O${}_{6}$ argued feature unusual quasimolecular orbitals (QMO), combining strong electronic localization on QMO level with full intra-QMO delocalization. Here, authors study, using battery experimental and theoretical methods, another putative compound --...
Abstract In situ thermo‐Raman spectroscopy is used to study a single crystal of natural orthorhombic cubanite from the Talnakh copper‐nickel sulfide deposit (Norilsk, Russia). The dependence wavenumbers and FWHMs vibrational modes on temperature, including → isocubanite phase transition region, studied in range 83–873 K. For first time, polarized Raman spectra have been interpreted according ab initio calculations performed using density functional theory (DFT) implemented VASP package....
Investigation of the recently synthesized series isostructural compounds ${\mathrm{Ba}}_{4}{\mathrm{NbTM}}_{3}{\mathrm{O}}_{12}$ $(\mathrm{TM}=\mathrm{Mn}, \mathrm{Rh}, \mathrm{and} \mathrm{Ir})$ with transition-metal trimers in a face-sharing geometry makes it possible to examine tendency molecular orbitals (MO) formation going from $3d$ $5d$ transition metal ions. Our ab initio calculations electronic and magnetic properties describe experimental findings demonstrate gradual picture...
Gold is one of the most inert metals, forming very few compounds, and only a them are currently known to be superconducting. Here we have found yet another chemical compound gold (and silver) that
We report results of the Raman measurements for ${\mathrm{SrRu}}_{2}{\mathrm{O}}_{6}$ having extraordinary high N\'eel temperature a layered material. No additional phonon modes were detected at magnetic transition thus excluding lowering symmetry in magnetically ordered phase. An unusual increase softening and damping some phonons as approaches ${T}_{N}$ indicates appearance continuum interacting electronic excitations $T\ensuremath{\ge}300\phantom{\rule{4.pt}{0ex}}\text{K}$. also observe...
Raman spectroscopy is used to control the kinetics of magnetostructural transition in ${\mathrm{Li}}_{2}{\mathrm{RuO}}_{3}$ crystals from low-temperature dimerized phase ($P{2}_{1}/m$) high-temperature ($C2/m$) at ${T}_{c}\ensuremath{\sim}550$ K accompanied by destruction spin singlets on Ru-Ru bonds. The theoretical group analysis and results density functional theory calculations lattice dynamics were identify phonon modes that are sensitive transition. observed anomalies behavior...
The results of polarization-dependent Raman spectroscopy single-crystalline LiVO$_2$ exhibiting transition to a diamagnetic state below $T_c \sim $500K are reported. Our measurements clearly detect additional peaks in the low-temperature phase, which disappear nearly completely when heated above $T_c$. Proposed $\sqrt{3}$a \times lattice reconstruction explains these new by Brillouin zone folding. experiment, on one hand, confirms that symmetry non-magnetic phase is not lower than trigonal,...
The electronic and magnetic properties of recently synthesized new perovskite phase HgMnO$_3$ are studied. By means $ab$ $initio$ DFT calculations this material was shown to be altermagnetic. We discuss features its structure unveil the physical mechanism anomalous suppression antiferromagnetic exchange interaction in material. While it is tempting ascribe unexpectedly weak between nearest neighbors crystal distortions, indirect ferromagnetic via Hg $6s$ states, which strongly affects...
Raman spectroscopy together with density functional calculations were used to study lattice dynamics in a layered honeycomb cobaltite Na$_3$Co$_2$SbO$_6$, which can host field-induced phase related the Kitaev physics. We show that there develops an additional mode well above Neel temperature (at $\approx 200$K) at 525 cm$^{-1}$, origin be electronic excitation one of $j_{3/2}$ doublets. Moreover, our theoretical demonstrate highest frequency intensive oxygen vibrations is very sensitive type...
The electronic and magnetic properties of a recently synthesized perovskite phase ${\mathrm{HgMnO}}_{3}$ are studied. By means ab initio density functional theory calculations this material was shown to be altermagnetic. We discuss the features its structure unveil physical mechanism anomalous suppression antiferromagnetic exchange interaction in material. While it is tempting ascribe unexpectedly weak between nearest neighbors crystal distortions, an indirect ferromagnetic via Hg $6s$...
MnSnTeO6, a new chiral antiferromagnet, was prepared both by topotactic transformation of the metastable rosiaite-type polymorph and direct synthesis from coprecipitated hydroxides. Its structure its static dynamic magnetic properties were studied comprehensively experimentally (through X-ray neutron powder diffraction, magnetization, specific heat, dielectric permittivity, ESR techniques) theoretically (by means ab initio density functional theory (DFT) calculations within spin-polarized...
Gold is one of the most inert metals, forming very few compounds, some with rather interesting properties, and only two them currently known to be superconducting under certain conditions (AuTe$_2$ SrAuSi$_3$). Compounds another noble element, Ag, are also relatively rare, superconducting. Finding new materials containing gold (and silver) a challenge - especially having in mind that best high-$T_c$ superconductors at normal based upon their close ''relative'', Cu. Here we report combined...
The article presents the characteristics of ego-documents from located in State Archive Republic Buryatia personal fond Kyakhta merchant second half 19th century Mikhail Fedorovich Nemchinov. Among surviving manuscripts are autobiographical notes, and business correspondence. All these sources together form a voluminous family archive, which itself is quite rare phenomenon. texts contain information about advancement social ladder native peasantry, later 1st guild, upbringing peasant...