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This article is cited in 2 scientific papers (total in 2 papers)
CONDENSED MATTER
Unique structural features of NbS$_3$ ribbon whiskers
V. P. Martovitskiia, A. Yu. Klokova, V. Ya. Pokrovskiib a Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
b Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, Moscow, 125009 Russia
Abstract:
The X-ray diffraction analysis of NbS$_3$ ribbon whiskers has revealed three structural features: (i) a fine-crystalline structure throughout the entire volume with the preferred orientation along the [001] direction perpendicular to the long $b$ axis of the whisker, (ii) the combination of crystalline macroblocks with a length up to 0.5 mm with small crystallites of various orientations, and (iii) the combination of crystalline macroblocks with the left-hand twisting of planes around the b axis with a pitch angle of 1.25$^\circ$ per every 0.2 mm and with the return to the initial orientation in the next block. Structural features (ii) and (iii) of NbS$_3$ whiskers have not yet been observed, and inorganic crystals with such properties are absent to the best of our knowledge. All crystallites have a unit cell with almost right angles and approximately the same lattice constant c (18.130 Å), whereas the lattice constants a and b are noticeably different in a single sample. All crystallites can be referred to phase IV rather than to phase I, as expected. The right angle between the $a$ and $c$ axes can be explained by the twinning of phase I along the $c$ axis. Differences in the lattice constants in macroblocks indicate large stresses in structures. Such stresses near twins (and/or stacking faults) can significantly affect the free electron density and play a key role in the formation of charge density waves in various phases of NbS$_3$.
Received: 05.06.2023 Revised: 29.06.2023 Accepted: 30.06.2023
Citation:
V. P. Martovitskii, A. Yu. Klokov, V. Ya. Pokrovskii, “Unique structural features of NbS$_3$ ribbon whiskers”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:3 (2023), 191–196; JETP Letters, 118:3 (2023), 195–200
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https://www.mathnet.ru/eng/jetpl7006 https://www.mathnet.ru/eng/jetpl/v118/i3/p191
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Abstract page: | 26 | References: | 11 | First page: | 1 |
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