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20002026
most citedPuzzle of the gamma-alpha and other phase transitions in cerium

198 citations

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31 papers · 1 filter

cond-mat.mtrl-sci2026

On Fano effect in IR spectra of hydrogenated nanodiamonds

Andrei A. Shiryaev, Evgeni A. Ekimov

Hydrogenated nanodiamonds may show a "transmission window" in infra-red spectra in the vicinity of diamond Raman frequency. This phenomenon is a manifestation of resonance coupling…

cond-mat.mtrl-sci2025★ 1 cited

Diamond crystal with Y-defects: spectroscopy and transmission electron microscopy

A. A. Shiryaev, E. A. Vasilev, A. L. Vasilev +3

The paper presents results of investigation of a natural Ib-IaA diamond containing Y-defects from Yubileinaya kimberlite pipe, Yakutia. Analysis of spatial distribution of nitrogen…

cond-mat.mtrl-sci2025

Trace Element Behavior during Shock Transformation of Zircon to Reidite

A. A. Shiryaev, A. N. Zhukov, V. V. Yakushev +6

Large single crystals of natural zircon were shock-loaded at 13.6 and 51.3 GPa in planar geometry. No structural changes were observed after loading at 13.6 GPa. Loading to 51.3 GP…

cond-mat.mtrl-sci2023★ 3 cited

Exsolution of oxygen impurity from diamond lattice and formation of pressurized CO2-I precipitates

Andrei A. Shiryaev, Yurii Chesnokov, Alexander L. Vasiliev +1

Diamond single crystals showing Infra-red features of pressurized CO2-I phase were studied using Transmission Electron Microscopy (TEM) and tomography. Numerous O-containing precip…

cond-mat.mtrl-sci2022★ 3 cited

Synthesis of technetium hydride TcH at 27 GPa

D. Zhou, D. V. Semenok, M. A. Volkov +7

In this work, we synthesize and investigate lower technetium hydrides at pressures up to 45 GPa using the synchrotron X-ray diffraction, reflectance spectroscopy, and ab initio cal…

cond-mat.mtrl-sci2022★ 44 cited

Size-dependent thermal stability and optical properties of ultra-small nanodiamonds synthesized under high pressure

E. A. Ekimov, A. A. Shiryaev, Yu. Grigoriev +4

Diamond properties down to the quantum-size region are still poorly understood. High-pressure high-temperature (HPHT) synthesis from chloroadamantane molecules allows precise contr…

cond-mat.mtrl-sci2022★ 5 cited

Structural peculiarities, mineral inclusions and point defects in yakutites -- a variety of impact-related diamond

Andrei A. Shiryaev, Anton D. Pavlushin, Alexei V. Pakhnevich +3

An unusual variety of impact-related diamond from the Popigai impact structure - yakutites - is characterized by complementary methods including optical microscopy, X-ray diffracti…

cond-mat.mtrl-sci2021★ 17 cited

Parametrization of Non-Bonded Force Field Terms for Metal-Organic Frameworks Using Machine Learning Approach

Vadim V. Korolev, Yurii M. Nevolin, Thomas A. Manz +1

The enormous structural and chemical diversity of metal-organic frameworks (MOFs) forces researchers to actively use simulation techniques on an equal footing with experiments. MOF…

cond-mat.mtrl-sci2021★ 14 cited

Shift of CO2-I absorption bands in diamond: a pressure or compositional effect? A FTIR mapping study

Evgenii P. Barannik, Andrey A. Shiryaev, Thomas Hainschwang

Infra-red maps and profiles with high spatial resolution were obtained for two single crystal diamonds with pronounced CO2 IR absorption peaks. Detailed examination allows unambigu…

cond-mat.mtrl-sci2020★ 7 cited

Inelastic neutron scattering: A novel approach towards determination of equilibrium isotopic fractionation factors. Size effects on heat capacity and beta-factor of diamond

Andrey A. Shiryaev, Veniamin B. Polyakov, Stephane Rols +2

A new experimental method of determination of equilibrium isotopic properties of substances based on Inelastic Neutron Scattering (INS) is proposed. We present mathematical formali…

cond-mat.mtrl-sci2020★ 5 cited

Hopping charge transport in amorphous organic and inorganic materials with spatially correlated random energy landscape

S. V. Novikov

General properties of the hopping transport of charge carriers in amorphous organic and inorganic materials are discussed. We consider the case where the random energy landscape in…

cond-mat.mtrl-sci2020★ 2 cited

Two-dimensional bimolecular recombination in amorphous organic semiconductors

S. V. Novikov

We consider the two-dimensional bimolecular recombination of charge carriers in amorphous organic semiconductors having the lamellar structure. We calculate the dependence of the e…

cond-mat.mtrl-sci2020★ 4 cited

Enhanced Bimolecular Recombination of Charge Carriers in Amorphous Organic Semiconductors: Overcoming the Langevin Limit

S. V. Novikov

We consider the bimolecular charge carrier recombination in amorphous organic semiconductors having a special kind of energetic disorder where energy levels for electrons and holes…

cond-mat.mtrl-sci2019★ 10 cited

Modification of Nanodiamonds by Xenon Implantation: A Molecular Dynamics Study

Jason L. Fogg, Alireza Aghajamali, Jonathan A. Hinks +3

Xenon implantation into nanodiamonds is studied using molecular dynamics. The nanodiamonds range in size from 2-10 nm and the primary knock-on (PKA) energy extends up to 40 keV. Fo…

cond-mat.mtrl-sci2018★ 35 cited

Ion implantation in nanodiamonds: size effect and energy dependence

Andrey A. Shiryaev, Jonathan A. Hinks, Nigel A. Marks +9

Nanoparticles are ubiquitous in nature and are increasingly important for technology. They are subject to bombardment by ionizing radiation in a diverse range of environments. In p…

cond-mat.mtrl-sci2017★ 12 cited

Anomalous enhancement of nanodiamond luminescence upon heating

A. A. Khomich, O. S. Kudryavtsev, T. A. Dolenko +4

Characteristic photoluminescence (PL) of nanodiamonds (ND) of very different origin (detonation, HPHT, extracted from meteorite) was studied in situ at high temperatures in the ran…

cond-mat.mtrl-sci2013★ 45 cited

Charge Carrier Transport in Disordered Polymers

S. V. Novikov

General properties of charge carrier transport in disordered organic materials are discussed. Spatial correlation between energies of transport sites determines the form of the dri…

cond-mat.mtrl-sci2013

Organic glasses: cluster structure of the random energy landscape and its effect on charge transport and injection

S. V. Novikov

An appropriate model for the random energy landscape in organic glasses is a spatially correlated Gaussian field, generated by randomly located and oriented dipoles and quadrupoles…

cond-mat.mtrl-sci2013★ 1 cited

Estimation of the concentration of deep traps in organic photoconductors using two-photon absorption

S. V. Novikov, A. R. Tameev, A. V. Vannikov +1

Typically, amorphous organic materials contain high density of traps. Traps hinder charge transport and, hence, affect various working parameters of organic electronic devices. In…

cond-mat.mtrl-sci2013★ 16 cited

Time of Flight Transients in the Dipolar Glass Model

S. V. Novikov, A. P. Tyutnev, L. B. Schein

Using Monte Carlo simulation we investigated time of flight current transients predicted by the dipolar glass model for a random spatial distribution of hopping centers. Behavior o…

cond-mat.mtrl-sci2013★ 9 cited

Hopping charge transport in organic materials

S. V. Novikov

General properties of the transport of charge carriers (electrons and holes) in disordered organic materials are discussed. It was demonstrated that the dominant part of the total…

cond-mat.mtrl-sci2013★ 10 cited

Charge carrier transport in molecularly doped polycarbonate as a test case for the dipolar glass model

S. V. Novikov, A. P. Tyutnev

We present the results of Monte-Carlo simulations of the charge carrier transport in a disordered molecular system containing spatial and energetic disorders using the dipolar glas…

cond-mat.mtrl-sci2012★ 198 cited

Puzzle of the gamma-alpha and other phase transitions in cerium

A. V. Nikolaev, A. V. Tsvyashchenko

We discuss recent research on the phase transitions in cerium under pressure, including new experiments on the gamma-alpha transition, which indicate that it is a hidden structural…

cond-mat.mtrl-sci2012★ 11 cited

Extended defects in natural diamonds: Atomic Force Microscopy investigation

Radmir V. Gainutdinov, Andrey A. Shiryaev, Yana Fedortchouk

Surfaces of natural diamonds etched in high-pressure experiments in H2O, CO2 and H2O-NaCl fluids were investigated using Atomic Force Microscopy. Partial dissolution of the crystal…