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Alexey E. Romanov
Researcher at Saint Petersburg State University of Information Technologies, Mechanics and Optics
Publications - 209
Citations - 5517
Alexey E. Romanov is an academic researcher from Saint Petersburg State University of Information Technologies, Mechanics and Optics. The author has contributed to research in topics: Dislocation & Disclination. The author has an hindex of 36, co-authored 185 publications receiving 5067 citations. Previous affiliations of Alexey E. Romanov include Togliatti State University & University of Tartu.
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Strain-induced polarization in wurtzite III-nitride semipolar layers
TL;DR: Chakraborty et al. as discussed by the authors presented growth orientation dependence of the piezoelectric polarization of InxGa1−xN and AlyGa 1−yN layers matched to GaN and showed that the zero crossover has only a very small dependence on the In or Al content of the ternary alloy layer.
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Domain patterns in epitaxial rhombohedral ferroelectric films. I. Geometry and experiments
Stephen K. Streiffer,Charles B. Parker,Alexey E. Romanov,M. J. Lefevre,L. Zhao,James S. Speck,Wolfgang Pompe,C. M. Foster,G. R. Bai +8 more
TL;DR: In this article, the authors developed possible domain patterns for (001) oriented (pseudocubic indexing) epitaxial rhombohedral perovskite ferroelectric (FR) films.
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On the structure, stress fields and energy of nonequilibrium grain boundaries
TL;DR: In this paper, the changes of grain boundary (GB) structure caused by the absorption of lattice dislocations are analyzed, showing that the variance of GBD spacings is a good quantitative measure of the degree of GB structure nonequilibrium, and the abating law of x − 1 2 for long range stress fields of disordered GBD networks is also calculated.
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Stress relaxation in mismatched layers due to threading dislocation inclination
Alexey E. Romanov,James S. Speck +1 more
TL;DR: In this paper, a recently observed mechanism of elastic stress relaxation in mismatched layers is discussed, which is achieved by the inclination of pure edge threading dislocation lines with respect to the layer surface normal.
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Application of disclination concept to solid structures
TL;DR: The use of the disclination approach in physics and mechanics of solid structures is discussed in this article, where a number of qualitative and quantitative models for the structure formation and evolution in plastically deformed materials, including the properties of screened disclinations, are considered.