A5048959334- 2D Materials and Applications
- Advanced Condensed Matter Physics
- Acoustic Wave Resonator Technologies
- Solid-state spectroscopy and crystallography
- Magnetic and transport properties of perovskites and related materials
- High-pressure geophysics and materials
- Inorganic Fluorides and Related Compounds
- Crystal Structures and Properties
- Semiconductor Quantum Structures and Devices
- X-ray Diffraction in Crystallography
- Glass properties and applications
- Thermodynamic and Structural Properties of Metals and Alloys
- Graphene research and applications
- Quasicrystal Structures and Properties
- Physics of Superconductivity and Magnetism
- ZnO doping and properties
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Chalcogenide Semiconductor Thin Films
- Boron and Carbon Nanomaterials Research
- Microstructure and mechanical properties
- Photorefractive and Nonlinear Optics
- Luminescence Properties of Advanced Materials
- Advanced ceramic materials synthesis
- Topological Materials and Phenomena
Ural Federal University
2010-2023
Ekaterinburg State Theatre Institute
2015
In Kitaev spin liquids, $S$ = \textonehalf{} quantum spins on a honeycomb lattice with bond-dependent interactions fractionalize into Majorana fermions. Fingerprints of these fractionalized excitations can be detected via thermodynamic measurements. Here, the authors perform detailed heat capacity experiments spin-liquid candidate $\ensuremath{\alpha}$-RuCl${}_{3}$ as function temperature and magnetic field. To estimate intrinsic phonon contribution, they measure nonmagnetic reference...
We perform a systematic first-principles study of phosphorene in the presence typical monovalent (hydrogen and fluorine) divalent (oxygen) impurities.
Halloysite nanotube rolling was modelled using molecular dynamics.
First principles calculations of the magnetic and electronic properties VSe<sub>2</sub> describing transition between two structural phases (H,T) were performed.
Cubic crystal structure and regular octahedral environment of Ir$^{4+}$ render antifluorite-type K$_2$IrCl$_6$ a model fcc antiferromagnet with combination Heisenberg Kitaev exchange interactions. High-resolution synchrotron powder diffraction confirms cubic symmetry down to at least 20 K, low-energy rotary mode gradually suppressed upon cooling. Using thermodynamic transport measurements, we estimate the activation energy $\Delta\simeq 0.7$ eV for charge transport, antiferromagnetic...
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 role of interlayer bonds in the two-dimensional (2D) materials "beyond graphene" and so-called van der Waals heterostructures is vital, understanding nature these terms strength type essential due to a wide range their prospective technological applications. However, this issue has not yet been properly addressed previous investigations devoted 2D materials. In our work, by using first-principles calculations we perform systematic study charge redistribution several representative that...
Coulomb interaction and its screening play an important role in many physical phenomena of materials ranging from optical properties to many-body effects including superconductivity. Here, we report on a systematic study dielectric few-layer black phosphorus (BP), two-dimensional material with promising electronic characteristics. We use combination tight-binding model rigorously determined bare interactions, which allows us consider relevant microscopic beyond the long-wavelength limit....
Screening in reduced dimensions has strong consequences on the electronic properties van der Waals semiconductors, impacting quasiparticle band gap and exciton binding energy. these materials is typically treated isotropically, yet black phosphorus exhibits in-plane anisotropy seen its effective mass, carrier mobility, excitonic wavefunctions, plasmonic dispersion. Here, we use adsorption of individual potassium atoms surface to vary near-surface doping over a wide range, while...
Density-functional calculations of lattice dynamics and high-resolution synchrotron powder diffraction uncover antiferroelectric distortion in the kagome francisite Cu$_3$Bi(SeO$_3$)$_2$O$_2$Cl below 115K. Its Br-containing analogue is stable room-temperature crystal structure down to at least 10K, although Br compound on verge a similar instability reveals local displacements Cu atoms. The I-containing its according density-functional calculations. We show that involves cooperative Cl...
We explore magnetic behavior of kagome francisites Cu3Bi(SeO3)2O2X (X = Cl and Br) using first-principles calculations. To this end, we propose an approach based on the Hubbard model in Wannier functions basis constructed level local-density approximation (LDA). The ground-state spin configuration is determined by a Hartree-Fock solution both zero field applied fields. Additionally, parameters effective Hamiltonian are obtained taking into account hybridization effects spin-orbit coupling....
Crystal structure, electronic state of Ir$^{4+}$, and magnetic properties the antifluorite compound K$_2$IrBr$_6$ are studied using high-resolution synchrotron x-ray diffraction, resonant inelastic scattering (RIXS), thermodynamic transport measurements, ab initio calculations. The crystal symmetry is reduced from cubic at room temperature to tetragonal below 170 K eventually monoclinic 122 K. These changes tracked by evolution non-cubic crystal-field splitting $\Delta$ measured RIXS....
We report on a theoretical study of collective electronic excitations in single-layer antimony crystals (antimonene), novel two-dimensional semiconductor with strong spin-orbit coupling. Based tight-binding model, we consider electron-doped antimonene and demonstrate that the combination effects external bias gives rise to peculiar plasmon mid-infrared spectral range. These are characterized by low losses negative dispersion at frequencies effectively tunable doping voltage. The observed...
The mixing of orbital and spin character in the wave functions $5d$ iridates has led to predictions strong couplings among their lattice, electronic magnetic degrees freedom. As well as realizing a novel spin-orbit assisted Mott-insulating ground state, perovskite iridate Sr$_{2}$IrO$_{4}$ similarities with cuprate La$_{2}$CuO$_{4}$, which on doping hosts charge-density that appears intimately connected high-temperature superconductivity. These phenomena can be sensitively probed through...
Abstract Hydrostatic transmissions, which are usually used in the drives of mobile machines, have recently been actively other working bodies machines. For example, mixers concrete carriers, agricultural machines - straw cutters, etc. This area use hydrostatic transmissions is developing. The successful solution this problem prevented by occurrence vibrational operating modes while reducing inertial and technological loads, some cases leads to significant disturbances operation Using...
A principally new approach for the investigation of lattice vibrations induced by impurities charged with respect to has been proposed based on an observation 3d impurity excitons strongly interacting vibrations. In electroabsorption spectrum there are many zero-phonon line repetitions which include dominant and combination peaks. Very intensive peaks repeated common frequency mode. Such unusual structure is explained as a result sufficient anharmonicity inherent essential property Model...