Low-energy dielectric screening in Pd and PdHx systems
| Parent link: | Journal of Physics: Condensed Matter Vol. 27, iss. 5.— 2015.— [055501, 11 p.] |
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| Other Authors: | , , , , |
| Summary: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1088/0953-8984/27/5/055501 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667425 |