81 citations · 195 across the 8 of their papers we have counts for
8 papers
Enhanced mobility of high-frequency discrete breathers in a monatomic chain with odd anharmonicity
Aleksander Shelkan, Mihhail Klopov, Vladimir Hizhnyakov
The mobility of high-frequency discrete breathers in monatomic chains with nonlinear interatomic potentials of the nearest neighbours is considered. It was found that the odd (cubi…
Transverse intrinsic localized modes in monatomic chain and in graphene
V. Hizhnyakov, M. Klopov, A. Shelkan
In this paper an analytical and numerical study of anharmonic vibrations of monatomic chain and graphene in transverse (perpendicular) with respect to the chain/plane direction is…
Excitons in \ce{Mg(OH)2} and \ce{Ca(OH)2} from \textit{ab initio} calculations
A. Pishtshev, S. Zh. Karazhanov, M. Klopov
By using \textit{ab initio} calculations with the HSE06 hybrid functional and GW approximation combined with numerical solution of the Bethe Salpeter equation (GW-BSE) we predict t…
Theory and MD simulations of intrinsic localized modes and defect formation in solids
V. Hizhnyakov, M. Haas, A. Shelkan +1
MD simulations of recoil processes following the scattering of X-rays or neutrons have been performed in ionic crystals and metals. At small energies (<10 eV) the recoil can induce…
Prediction of high frequency intrinsic localized modes in Ni and Nb
M. Haas, V. Hizhnyakov, A. Shelkan +2
It is found that in some metals an intrinsic localized mode may exist with frequency above the top of the phonon spectrum. The necessary condition, requiring sufficiently high rati…
Linear local modes induced by intrinsic localized modes in a monatomic chain
V. Hizhnyakov, A. Shelkan, M. Klopov +2
A theory is developed to describe the effect of an intrinsic localized mode (ILM) on small vibrations in a monatomic chain with hard quartic anharmonicity. One prediction is the ap…
Assessing structural bonding aspects of multiband superconductors through impurity-induced local lattice distortions: a case study on MgB2
Aleksandr Pishtshev, Mihhail Klopov
We report the results of an ab initio modeling of substitutional impurities such as zinc, copper and zirconium ions incorporated into the magnesium sublattice of MgB2. The goal of…
Self-consistent theory of intrinsic localized modes: application to monatomic chain
V. Hizhnyakov, A. Shelkan, M. Klopov
A theory of intrinsic localized modes (ILMs) in anharmonic lattices is developed, which allows one to reduce the original nonlinear problem to a linear problem of small variations…