Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Acoustic Plasmons in Nickel and Its Modification upon Hydrogen Uptake. / Коротеев, Юрий Михайлович; Silkin, I.V.; Chernov, I.P.; Чулков, Евгений Владимирович; Silkin, V.M.
в: Nanomaterials, Том 13, № 1, 141, 2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Acoustic Plasmons in Nickel and Its Modification upon Hydrogen Uptake
AU - Коротеев, Юрий Михайлович
AU - Silkin, I.V.
AU - Chernov, I.P.
AU - Чулков, Евгений Владимирович
AU - Silkin, V.M.
PY - 2023
Y1 - 2023
N2 - In this work, we study, in the framework of the ab initio linear-response time-dependent density functional theory, the low-energy collective electronic excitations with characteristic sound-like dispersion, called acoustic plasmons, in bulk ferromagnetic nickel. Since the respective spatial oscillations in slow and fast charge systems involve states with different spins, excitation of such plasmons in nickel should result in the spatial variations in the spin structure as well. We extend our study to NiHx with different hydrogen concentrations x. We vary the hydrogen concentration and trace variations in the acoustic plasmons properties. Finally, at x=1 the acoustic modes disappear in paramagnetic NiH. The explanation of such evolution is based on the changes in the population of different energy bands with hydrogen content variation.
AB - In this work, we study, in the framework of the ab initio linear-response time-dependent density functional theory, the low-energy collective electronic excitations with characteristic sound-like dispersion, called acoustic plasmons, in bulk ferromagnetic nickel. Since the respective spatial oscillations in slow and fast charge systems involve states with different spins, excitation of such plasmons in nickel should result in the spatial variations in the spin structure as well. We extend our study to NiHx with different hydrogen concentrations x. We vary the hydrogen concentration and trace variations in the acoustic plasmons properties. Finally, at x=1 the acoustic modes disappear in paramagnetic NiH. The explanation of such evolution is based on the changes in the population of different energy bands with hydrogen content variation.
KW - electronic excitations
KW - hydrides
KW - nickel
KW - plasmons
UR - https://www.mendeley.com/catalogue/eb7eb372-5a30-3b9b-88bc-ed9a82b81b99/
U2 - 10.3390/nano13010141
DO - 10.3390/nano13010141
M3 - Article
C2 - 36616051
VL - 13
JO - Nanomaterials
JF - Nanomaterials
SN - 2079-4991
IS - 1
M1 - 141
ER -
ID: 103174239