A5018805750- Iron-based superconductors research
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Solid State Laser Technologies
- Graphene research and applications
- Photonic Crystal and Fiber Optics
- Rare-earth and actinide compounds
- Glass properties and applications
- Advanced Fiber Laser Technologies
- 2D Materials and Applications
- Advanced Condensed Matter Physics
- MXene and MAX Phase Materials
- Quantum many-body systems
- Corporate Taxation and Avoidance
Institute of Chemistry of High-Purity Substances them. G.G.Devyatyh
2023
Institute of Applied Physics
2023
Technische Universität Braunschweig
2017-2021
Saint Petersburg State Electrotechnical University
2013-2014
Lappeenranta-Lahti University of Technology
2013-2014
Raman scattering in the three-dimensional Dirac semimetal Cd3As2 shows an intricate interplay of electronic and phonon degrees freedom. We observe resonant due to interband transitions, anomalous anharmonicity frequency intensity, as well quasielastic (E~0) scattering. The latter two effects are governed by a characteristic temperature scale T* ~ 100 K that is related mutual fluctuations lattice A refined analysis this corresponds energy optical phonons which couple transitions states...
Erbium-doped high purity zinc-tellurite fiber lasers operating at 2.7– <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2.8~\mu \text{m}$ </tex-math></inline-formula> were demonstrated by pumping in the 980 nm Er3+ absorption band. To best of our knowledge, a maximum pulse energy notation="LaTeX">$500~\mu \text{J}$ over notation="LaTeX">$\sim 100~\mu \text{s}$ duration with slope efficiency 5 % was achieved...
Temperature dependence of single vortex magnetic moment in nanosize superconducting particles is investigated the framework quasiclassical Eilenberger approach. Such nanoparticles can be used for preparation high-quality thin films with high critical current density. In contrast to bulk materials where totally determined by flux quantum, nano-sized specimens (with characteristic size, D, much less than effective penetration depth, λeff) quantization rule violated and proportional...
The vibrational and electronic properties of the Pb-doped dichalcogenide PbxTaSe2 (x = 0, 0.25, 0.33, 0.5, 0.75, 1) have been investigated using Raman scattering experiments. A marked variation main modes with Pb concentration x is observed. dependence resembles in TaSe2 on number crystallographic layers along c-axis direction. temperature polarization dependences spectra revealed additional broad low-frequency regime, which are discussed context remnant charge density wave, induced...
The mechanism of unconventional superconductivity in recently discovered Fe-based superconductors has been intensively discussed. A plausible candidate is the superconducting (SC) pairing mediated by antiferromagnetic (AFM) interactions. There are two different approaches predicting s± state, which SC gap shows an s-wave symmetry that changes sign between Fermi-surface (FS) sheets. first one based on itinerant spin fluctuations promoted FS nesting, and second local AFM exchange couplings. We...
There is some evidence that the electron-phonon mechanism not strong enough to produce observed high critical temperatures in unconventional superconductors; this case both cuprates and Fe-based superconductors. The d-wave pairing strongly correlated systems consistent with observation of nodal quasiparticles heavily hole doped superconductor KFe2As2 Tc = 3 K high-Tc cuprates. In work Eilenberger equations are solved for anisotropic dx2−y2-wave cutoff parameter ξh vortex core size ξ2 (the...
In recent years, great progress has been made in the technology of high-purity and ultra-dry tellurite glasses, which enabled creation single-mode fibers doped with rare-earth ions. This it possible to demonstrate laser generation range about 2.7 μm erbium-doped tungsten fibers. this paper, we present an experimental study broadband amplification zinc-tellurite Zinc-tellurite glasses containing modifying components, such as Na2O, La2O3, Bi2O3, or metal oxides, are known have noticeably lower...