TY  - SER
AU  - Silkin,Vyacheslav M.
AU  - Chernov,I.P.
AU  - Sklyadneva,Irina Yu
AU  - Chulkov,Evgueni V.
AU  - Nazarov,V.U.
ED  - Томский государственный университет
TI  - Low-energy dielectric screening in Pd and PdHx systems
KW  - диэлектрические свойства
KW  - палладий
KW  - плазмоны
KW  - Ферми поверхности
KW  - статьи в журналах
N1  - Библиогр.: 79 назв
N2  - Modifications in dielectric properties of palladium upon absorption of hydrogen are investigated theoretically in the low-energy (0–2 eV) region. The calculations were performed with full inclusion of the electronic band structure obtained within a self-consistent pseudopotential approach. In particular, we trace the evolution of the acoustic-like plasmon (AP) found previously in clean Pd with increasing hydrogen concentration. It exists in PdHx up to the hydrogen content x corresponding to the complete filling of the 4d Pd-derived energy bands because of the presence of two kinds of carriers at the Fermi surface. At higher H concentration the AP disappears since only one kind of carrier within the sp-like energy band exists at the Fermi level. Additionally, we investigate the spatial distribution inside the crystal of a potential caused by a time-dependent external perturbation and observe drastic modifications in the screening properties in the PdHx systems with energy and with hydrogen concentration
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000534462
ER  -