One-dimensional plasmons in ultrathin metallic silicide wires of finite width
- authored by
- Eddy P. Rugeramigabo, Christoph Tegenkamp, Herbert Pfnür, Tadaaki Nagao
- Abstract
The acoustic dispersion of plasmons (PLs) in narrow (4 nm) and ultrathin (one unit cell) metallic DySi2 wires, grown by self-assembly on vicinal Si(100)-[011] 4° turns out to be unidirectional. We observed the lowest intersubband PL as well as the acoustic PL. These PLs are specific for narrow metallic strips of finite width. Our experimental and theoretical analysis suggests that only one of two electron pockets in the surface Brillouin zone makes a substantial contribution to the PLs because the other pocket has a much smaller conductive character due to a strong admixture of electronic states with d character.
- Organisation(s)
-
Institute of Solid State Physics
- External Organisation(s)
-
National Institute for Materials Science Tsukuba
- Type
- Article
- Journal
- Physical Review B - Condensed Matter and Materials Physics
- Volume
- 81
- ISSN
- 1098-0121
- Publication date
- 02.04.2010
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Electronic version(s)
-
https://doi.org/10.1103/PhysRevB.81.165407 (Access:
Unknown)
