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Modeling of the phosphorus radiation-enhanced diffusion in the course of implantation of high-energy protons into an elevated-temperature silicon substrate and during its treatment in a hydrogen-containing plasma with addition of a…

Materials Science · Physics 2014-10-24 O. I. Velichko

The analytical solutions of the equations describing impurity diffusion due to migration of nonequilibrium impurity interstitials were obtained for the impurity redistribution during ion implantation at elevated temperatures and for…

Materials Science · Physics 2008-02-24 O. I. Velichko , N. A. Sobolevskaya

To simulate the transient enhanced diffusion near the surface or interface, a set of equations describing the impurity diffusion and quasichemical reactions of dopant atoms and point defects in ion-implanted layers is proposed and analyzed.…

Materials Science · Physics 2007-05-23 O. I. Velichko , Yu. P. Shaman , A. K. Fedotov , A. V. Masanik

The equation of impurity diffusion due to formation, migration, and dissolution of the pairs "impurity atom - intrinsic point defect" taking into account the nonuniform distributions of nonequilibrium point defects and drift of the pairs in…

Materials Science · Physics 2011-06-14 O. I. Velichko , V. A. Burko

Tuning of the electronic properties of pre-synthesized colloidal semiconductor nanocrystals (NCs) by doping plays a key role in the prospect of implementing them in printed electronics devices such as transistors, and photodetectors. While…

Materials Science · Physics 2021-05-25 Yorai Amit , Yuanyuan Li , Anatoly I. Frenkel , Uri Banin

An analytical solution of the equations describing impurity diffusion due to the migration of nonequilibrium impurity interstitial atoms was obtained for the case of the Robin boundary condition on the surface of a semiconductor. The…

Materials Science · Physics 2008-02-26 O. I. Velichko , N. A. Sobolevskaya

An integro-differential expression for the diffusion current of the impurities diffusing by the mechanism of bound impurity-defect pairs has been derived. The ensuing nonlocal diffusion equation generalizes the existing theories of…

Soft Condensed Matter · Physics 2019-12-06 V. I. Tokar

A two stream model of boron diffusion in silicon has been developed. The model is intended for simulation of transient enhanced diffusion including redistribution of ion-implanted boron during low temperature annealing. The following…

Materials Science · Physics 2011-05-24 O. I. Velichko , A. A. Hundorina

Dispersed impurities in diamond present a flourishing platform for research in quantum informatics, spintronics and single phonon emitters. Based on the vast pool of experimental and theoretical work describing impurity atoms in diamond, we…

Materials Science · Physics 2023-08-31 D. Propst , J. Kotakoski , E. H. Åhlgren

An analysis of the equations used for modeling thermal arsenic diffusion in silicon has been carried out. It was shown that for arsenic diffusion governed by the vacancy-impurity pairs and the pairs formed due to interaction of impurity…

Materials Science · Physics 2015-04-28 O. I. Velichko

The analytical solution of the equation describing diffusion of intrinsic point defects has been obtained for a one-dimensional finite-length domain. This solution is intended for investigating and modeling the changes in defect…

Materials Science · Physics 2014-06-26 O. I. Velichko

Diffusion of impurity atoms depends on the sublattices occupied, active diffusion mechanisms, and jump frequencies to neighboring sites. The method of perturbed angular correlation of gamma rays (PAC) has been applied over the past decade…

Materials Science · Physics 2014-03-27 Gary S. Collins , Qiaoming Wang , John P. Bevington

We show that the optical and electronic properties of nanocrystalline silicon can be efficiently tuned using impurity doping. In particular, we give evidence, by means of ab-initio calculations, that by properly controlling the doping with…

Other Condensed Matter · Physics 2009-11-13 Federico Iori , Elena Degoli , Rita Magri , Ivan Marri , G. Cantele , D. Ninno , F. Trani , O. Pulci , Stefano Ossicini

The behavior of spin diffusion in doped semiconductors is shown to be qualitatively different than in undoped (intrinsic) ones. Whereas a spin packet in an intrinsic semiconductor must be a multiple-band disturbance, involving inhomogeneous…

Materials Science · Physics 2009-10-31 Michael E. Flatte , Jeff M. Byers

A theoretical investigation of the microscopic mechanisms provided the transient enhanced diffusion of boron atoms during rapid thermal annealing of silicon substrates doped by high fluence ion implantation was carried out. To compare the…

Mesoscale and Nanoscale Physics · Physics 2010-07-23 O. I. Velichko , A. A. Hundoryna

Motivated by the recent experiment by Marguerite et al. [1] on imaging in graphene samples, we investigate theoretically the dissipation induced by resonant impurities in the quantum Hall regime. The impurity induced forward scattering of…

Mesoscale and Nanoscale Physics · Physics 2020-03-25 Gu Zhang , Igor V. Gornyi , Alexander D. Mirlin

The diffusion equation for nonequilibrium interstitial impurity atoms taking into account their charge states and drift of all mobile interstitial species in the built-in electric field and in the field of elastic stress was obtained. The…

Materials Science · Physics 2007-05-23 O. I. Velichko

Ion implantation is a non-equilibrium doping technique which introduces impurity atoms into a solid regardless of thermodynamic considerations. The formation of metastable alloys above the solubility limit, minimized contribution of lateral…

Materials Science · Physics 2017-04-05 Y. G. Fedorenko

The paper examines superradiance in impurity crystals in the field of a coherent phonon wave excited by two ultrashort laser pulses via Raman scattering processes at the moment of preparation of the initial state of an ensemble of emitters.…

Optics · Physics 2020-03-12 A. P. Saiko

The irradiation represents a useful tool for determining the characteristics of defects in semiconductors as well as a method to evaluate their degradation, fact with important technological consequences. In this contribution, starting from…

Instrumentation and Detectors · Physics 2008-11-26 Sorina Lazanu , Ionel Lazanu
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