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research
One-dimensional plasmons in ultrathin metallic silicide wires of finite width
Authors
Takeshi Inaoka
Tadaaki Nagao
+3 more
Herbert Pfnür
Eddy P. Rugeramigabo
Christoph Tegenkamp
Publication date
1 January 2010
Publisher
College Park, MD : American Physical Society
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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. © 2010 The American Physical Society
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 21/11/2017