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Revin A. A. Mikhaylova A. M. Konakov A. A. Tsyplenkov V. V. Shastin V. N. 《Semiconductors》2021,55(12):879-884
Semiconductors - The wave functions of electrons localized at P, As, and Sb shallow donors in Ge are calculated in the envelope function approximation taking into account valley–orbit... 相似文献
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Fedotova J. A. Kharchanka A. A. Fedotov A. K. Chichkov M. V. Malinkovich M. D. Konakov A. O. Vorobyova S. A. Kasiuk J. V. Gumiennik U. E. Kula M. Mitura-Nowak M. Maximenko A. A. Przewoźnik J. Kapusta Cz. 《Physics of the Solid State》2020,62(2):368-377
Physics of the Solid State - Electrodeposition of cobalt on monolayer graphene synthesized by chemical vapor deposition produces Co–CoO/graphene composite structures, which is accompanied by... 相似文献
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The size-quantized energy subbands and envelope wave functions for [001] quantum wells based on zinc-blende III–V semiconductors are numerically calculated using the eight-band Kane model and finite-difference discretization scheme in coordinate space. The effect of the quantum-well band parameters and external electric field oriented along the structure growth direction on the ratio between the Rashba and Dresselhaus spin–orbit coupling parameters is studied. It is demonstrated that at certain electric-field values the spin–orbit coupling parameters in GaAs/InGaAs structures can be equal, which ensures the condition for forming stable spin helices. In addition, it is established that the spin–orbit coupling linear in wave vector in symmetric GaAs/InGaAs wells can disappear under certain well widths and barrier chemical compositions. 相似文献
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Consider a multidimensional stochastic differential equation of the form Xt=x+ò0tb(Xs-) ds+ò0tf(Xs-) dZsX_{t}=x+\int_{0}^{t}b(X_{s-})\,ds+\int_{0}^{t}f(X_{s-})\,dZ_{s}, where (Z
s
)
s≥0 is a symmetric stable process. Under suitable assumptions on the coefficients, the unique strong solution of the above equation
admits a density with respect to Lebesgue measure, and so does its Euler scheme. Using a parametrix approach, we derive an
error expansion with respect to the time step for the difference of these densities. 相似文献
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V. D. Konakov 《Journal of multivariate analysis》1973,3(4):454-468
Let
be a nonparametric estimate of a two-dimensional density f(x,y) constructed with the help of two-dimensional “window.” The main purpose of the paper is to study the asymptotic properties of the marginal moments estimates
and differentiable functions
,
of these moments. 相似文献
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In this paper, we consider projection estimates for Lévy densities in high-frequency setup. We give a unified treatment for different sets of basis functions and focus on the asymptotic properties of the maximal deviation distribution for these estimates. Our results are based on the idea to reformulate the problems in terms of Gaussian processes of some special type and to further analyze these Gaussian processes. In particular, we construct a sequence of excursion sets, which guarantees the convergence of the deviation distribution to the Gumbel distribution. We show that the exact rates of convergence presented in previous articles on this topic are logarithmic and construct the sequence of accompanying laws, which approximate the deviation distribution with polynomial rate. 相似文献
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The rate of tunnel migration of excited charge carriers (electrons and holes) in the array of silicon nanocrystals doped with
phosphorus is calculated. It is shown that, starting from certain phosphorus concentrations dependent on the relation between
the dimensions of the emitting and accepting nanocrystals, the rate of tunneling of electrons sharply decreases (by several
orders of magnitude) and becomes lower than the rate of interband radiative recombination 相似文献
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We consider triangular arrays of Markov chains that converge weakly to a diffusion process. Local limit theorems for transition
densities are proved.
Received: 28 August 1998 / Revised version: 6 September 1999 / Published online: 14 June 2000 相似文献