R
Roman Chernikov
Researcher at National Research Nuclear University MEPhI
Publications - 58
Citations - 529
Roman Chernikov is an academic researcher from National Research Nuclear University MEPhI. The author has contributed to research in topics: Valence (chemistry) & Extended X-ray absorption fine structure. The author has an hindex of 11, co-authored 52 publications receiving 449 citations.
Papers
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Journal ArticleDOI
Fluorite-pyrochlore phase transition in nanostructured Ln2Hf2O7 (Ln = La-Lu)
V. V. Popov,Alexey P. Menushenkov,Alexander Yaroslavtsev,Alexander Yaroslavtsev,Ya. V. Zubavichus,B. R. Gaynanov,A. A. Yastrebtsev,Denis Leshchev,Roman Chernikov +8 more
TL;DR: In this article, the authors studied the whole process of the crystal and local atomic structure realignment during the crystallization and the phase transition in the series of Ln 2 Hf 2 O 7 (Ln-=-La-Lu) samples synthesized by the coprecipitation method with the subsequent annealing of mixed hydroxides (precursors).
Journal ArticleDOI
A Transition from Localized to Strongly Correlated Electron Behavior and Mixed Valence Driven by Physical or Chemical Pressure in ACo2As2 (A = Eu and Ca).
Xiaoyan Tan,Gilberto Fabbris,Gilberto Fabbris,Daniel Haskel,Alexander Yaroslavtsev,Alexander Yaroslavtsev,Huibo Cao,Corey M. Thompson,Kirill Kovnir,Alexey P. Menushenkov,Roman Chernikov,V. Ovidiu Garlea,Michael Shatruk +12 more
TL;DR: The results reported herein demonstrate the general possibility of amplifying minor localized electronic effects to achieve major changes in material's properties via involvement of strongly correlated electrons.
Journal ArticleDOI
“Chemical Metamagnetism”: From Antiferromagnetic PrCo2P2 to Ferromagnetic Pr0.8Eu0.2Co2P2 via Chemical Compression
Kirill Kovnir,William M. Reiff,Alexey P. Menushenkov,Alexander Yaroslavtsev,Roman Chernikov,Michael Shatruk +5 more
TL;DR: In this article, a strong chemical compression that "squeezes out" electrons from the localized Eu 4f levels into the delocalized Co 3d subband is described.
Journal ArticleDOI
Synthesis, Structures, and Magnetic Properties of Rare-Earth Cobalt Arsenides, RCo2As2 (R = La, Ce, Pr, Nd)
Corey M. Thompson,Xiaoyan Tan,Kirill Kovnir,V. Ovidiu Garlea,A. A. Gippius,Alexander Yaroslavtsev,Alexey P. Menushenkov,Roman Chernikov,N. Büttgen,Wolfgang Krätschmer,Yan V. Zubavichus,Michael Shatruk +11 more
TL;DR: In this article, four rare-earth cobalt arsenides, RCo2As2 (R = La, Ce, Pr, Nd), were obtained by reactions of constituent elements in molten Bi.
Proceedings ArticleDOI
Powerful scriptable ray tracing package xrt
TL;DR: In this article, the authors present an open source ray tracing tool that offers several useful features in graphical presentation, material properties, advanced calculations of synchrotron sources, implementation of diffractive and refractive elements, complex (also closed) surfaces and multiprocessing.