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24 papers
Exploring van der Waals materials with high anisotropy: geometrical and optical approaches
Aleksandr S. Slavich, Georgy A. Ermolaev, Mikhail K. Tatmyshevskiy +15
The emergence of van der Waals (vdW) materials resulted in the discovery of their giant optical, mechanical, and electronic anisotropic properties, immediately enabling countless n…
Ternary superconducting hydrides in the La-Mg-H system
Grigoriy Shutov, Dmitrii Semenok, Ivan A. Kruglov +1
Ternary or more complex hydrogen-rich hydrides are the main hope of reaching room-temperature superconductivity at high pressures. Their chemical space is vast and its exploration…
A hidden advantage of van der Waals materials for overcoming limitations in photonic integrated circuitry
Andrey A. Vyshnevyy, Georgy A. Ermolaev, Dmitriy V. Grudinin +11
With the advance of on-chip nanophotonics, there is a high demand for high refractive index, low-loss materials. Currently, this technology is dominated by silicon, but van der Waa…
Non-Fermi-Liquid Behavior of Superconducting SnH
Ivan A. Troyan, Dmitrii V. Semenok, Anna G. Ivanova +13
We studied chemical interaction of Sn with H by X-ray diffraction methods at pressures of 180-210 GPa. A previously unknown tetrahydride SnH with a cubic structure (…
Hexagonal boron nitride nanophotonics
D. V. Grudinin, G. A. Ermolaev, D. G. Baranov +10
A global trend to miniaturization and multiwavelength performance of nanophotonic devices drives research on novel phenomena, such as bound states in the continuum and Mietronics,…
Giant and tunable excitonic optical anisotropy in single-crystal CsPbX halide perovskites
G. A. Ermolaev, A. P. Pushkarev, A. Yu. Zhizhchenko +16
During the last years, giant optical anisotropy demonstrated its paramount importance for light manipulation which resulted in numerous applications ranging from subdiffraction lig…
Effect of paramagnetic impurities on superconductivity in polyhydrides: -wave order parameter in Nd-doped LaH
Dmitrii V. Semenok, Ivan A. Troyan, Andrey V. Sadakov +19
Polyhydrides are a novel class of superconducting materials with extremely high critical parameters, which is very promising for applications. On the other hand, complete experimen…
Sr-Doped Molecular Hydrogen: Synthesis and Properties of SrH
Dmitrii V. Semenok, Wuhao Chen, Xiaoli Huang +9
Recently, several research groups announced reaching the point of metallization of hydrogen above 400 GPa. Following the mainstream of extensive investigations of compressed polyhy…
Plasmon-polariton modes in fullerenes
N. L. Matsko
It is well known that collective electronic excitations in fullerene C are manifested as Mie plasmons, and in graphene (the limiting case of an infinitely large fullerene) c…
Topological phase singularities in atomically thin high-refractive-index materials
Georgy Ermolaev, Kirill Voronin, Denis G. Baranov +15
Atomically thin transition metal dichalcogenides (TMDCs) present a promising platform for numerous photonic applications due to excitonic spectral features, possibility to tune the…
Crystal structure prediction at finite temperatures
Ivan A. Kruglov, Alexey V. Yanilkin, Yana Propad +1
Crystal structure prediction is a central problem of theoretical crystallography and materials science, which until mid-2000s was considered intractable. Several methods, based on…
Novel Strongly Correlated Europium Superhydrides
Dmitrii V. Semenok, Di Zhou, Alexander G. Kvashnin +11
We conducted a joint experimental-theoretical investigation of the high-pressure chemistry of europium polyhydrides at pressures of 86-130 GPa. We discovered several novel magnetic…
Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics
G. A. Ermolaev, D. V. Grudinin, Y. V. Stebunov +17
Large optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy was recent…
High-Pressure Synthesis of Barium Superhydrides: Pseudocubic BaH12
Wuhao Chen, Dmitrii V. Semenok, Alexander G. Kvashnin +9
Following the discovery of high-temperature superconductivity in the La-H system, where for the recently discovered fcc-LaH10 a record critical temperature Tc = 250 K was achieved…
Fast general two- and three-body interatomic potential
Sergey Pozdnyakov, Artem R. Oganov, Efim Mazhnik +2
We introduce a new class of machine learning interatomic potentials - fast General Two- and Three-body Potential (GTTP), which is as fast as conventional empirical potentials and r…
Superconductivity of and polyhydrides
Ivan A. Kruglov, Dmitrii V. Semenok, Hao Song +8
We explore high-pressure phase stability and superconductivity of lanthanum hydrides (m=4-11,16). We predict stability of a hitherto unreported polyhydride -$LaH_{1…
On Distribution of Superconductivity in Metal Hydrides
Dmitrii V. Semenok, Ivan A. Kruglov, Igor A. Savkin +2
Using the data on the superconducting critical temperature () for a number of metal hydrides, we found a rule that makes it possible to predict the maximum based onl…
Synthesis of clathrate cerium superhydride CeH9 below 100 GPa with atomic hydrogen sublattice
Nilesh P. Salke, M. Mahdi Davari Esfahani, Youjun Zhang +7
Hydrogen-rich superhydrides are believed to be very promising high-Tc superconductors as they are expected to mimic characteristics of metallic hydrogen. Recent experiments discove…
Actinium hydrides , , as high-temperature conventional superconductors
Dmitrii V. Semenok, Alexander G. Kvashnin, Ivan A. Kruglov +1
Stability of numerous unexpected actinium hydrides was predicted via evolutionary algorithm USPEX. Electron-phonon interaction was investigated for the hydrogen-richest and most sy…
Boron monosulfide: equation of state and pressure-induced phase transition
Kirill A. Cherednichenko, Ivan A. Kruglov, Artem R. Oganov +3
Quasi-hydrostatic compression of rhombohedral boron monosulfide (r-BS) has been studied up to 50 GPa at room temperature using diamond-anvil cells and angle-dispersive synchrotron…
Iron superhydrides FeH5 and FeH6: stability, electronic properties and superconductivity
Alexander G. Kvashnin, Ivan A. Kruglov, Dmitrii V. Semenok +1
Recently a big number of works devoted to search for new hydrides with record high-temperature superconductivity and at the same time the successful synthesis of potential high-TC…
High-Temperature Superconductivity in Th-H System at Pressure Conditions
Alexander G. Kvashnin, Dmitry V. Semenok, Ivan A. Kruglov +2
New stable thorium decahydride -, a record high-temperature superconductor with up to 241 K (), critical field up to 71T and superco…
Uranium polyhydrides at moderate pressures: prediction, synthesis, and expected superconductivity
Ivan A. Kruglov, Alexander G. Kvashnin, Alexander F. Goncharov +7
Hydrogen-rich hydrides attract great attention due to recent theoretical (1) and then experimental discovery of record high-temperature superconductivity in H3S (Tc = 203 K at 155…
Hydrogen sulfide at high pressure: change in stoichiometry
Alexander F. Goncharov, Sergey Lobanov, Ivan Kruglov +5
Hydrogen-sulfide (H2S) was studied by x-ray synchrotron diffraction (XRD) and Raman spectroscopy up to 150 GPa at 180-295 K and by quantum-mechanical variable-composition evolution…