Manipulation of the surface density of states of Ag(111) by means of resonators. Experiment and theory.
Resumen: We show that the density of surface Shockley states of Ag(111) probed by the differential conductance G(V ) = d I /d V by a scanning-tunneling microscope (STM) can be enhanced significantly at certain energies and positions introducing simple arrays of Co or Ag atoms on the surface, in contrast to other noble-metal surfaces. Specifically we have studied resonators consisting of two parallel walls of five atoms deposited on the clean Ag(111) surface. A simple model in which the effect of the adatoms is taken into account by an attractive local potential and a small hybridization between surface and bulk at the position of the adatoms explains the main features of the observed G(V ) and allows us to extract the proportion of surface and bulk states sensed by the STM tip. These results might be relevant to engineer the surface spectral density of states, to study the effects of surface states on the Kondo effect, and to separate bulk and surface contributions in STM studies of topological surface states.
Idioma: Inglés
DOI: 10.1103/PhysRevB.94.075408
Año: 2016
Publicado en: Physical Review B. Condensed Matter and Materials Physics 94 (2016), 075408 [8 pp.]
ISSN: 1098-0121

Factor impacto JCR: 3.836 (2016)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 18 / 67 = 0.269 (2016) - Q2 - T1
Factor impacto SCIMAGO: 2.339 - Electronic, Optical and Magnetic Materials (Q1) - Condensed Matter Physics (Q1)

Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.


Exportado de SIDERAL (2020-02-21-13:35:54)

Este artículo se encuentra en las siguientes colecciones:
Articles



 Record created 2016-09-20, last modified 2020-02-21


Versión publicada:
 PDF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)