Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/44058
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Localization, splitting, and mixing of field emission resonances induced by alkali metal clusters on Cu(100) |
Autor: | Stepanow, Sebastian CSIC ORCID; Mugarza, Aitor CSIC ORCID; Ceballos, Gustavo CSIC ORCID; Gambardella, Pietro; Aldazabal, Íñigo CSIC ORCID; Borisov, Andrei G. CSIC; Arnau, Andrés CSIC ORCID | Fecha de publicación: | 2011 | Editor: | American Physical Society | Citación: | Physical Review B 83(11): 115101 (2011) | Resumen: | We report on a joint scanning tunneling microscopy (STM) and theoretical wave packet propagation study of field emission resonances (FER’s) of nanosized alkali metal clusters deposited on a Cu(100) surface. In addition to FER’s of the pristine Cu(100) surface, we observe the appearance of island-induced resonances that are particularly well resolved for STM bias voltage values corresponding to electron energies inside the projected band gap of the substrate. The corresponding dI/dV maps reveal island-induced resonances of different nature. Their electronic densities are localized either inside the alkali cluster or on its boundaries. Our model calculations allow us to explain the experimental results as due to the coexistence and mixing of two kinds of island-induced states. On the one side, since the alkali work function is lower than that of the substrate, the nanosized alkali metal clusters introduce intrinsic localized electronic states pinned to the vacuum level above the cluster. These states can be seen as the FER’s of the complete alkali overlayer quantized by the cluster boundaries. On the other side, the attractive potential well due to the alkali metal cluster leads to two-dimensional (2D) localization of the FER’s of the Cu(100) surface, the corresponding split component of the resonances appearing below the bottom of the parent continuum. Our main conclusions are based on the attractive nature of the alkali ad-island potential. They are of general validity and, therefore, significant to understand electron confinement in 2D. | Descripción: | 12 páginas, 11 figuras.-- PACS number(s): 73.20.At, 73.20.Hb, 73.22.Dj, 68.37.Ef | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.83.115101 | URI: | http://hdl.handle.net/10261/44058 | DOI: | 10.1103/PhysRevB.83.115101 | ISSN: | 1098-0121 | E-ISSN: | 1550-235X |
Aparece en las colecciones: | (CFM) Artículos (CIN2) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
e115101.pdf | 1,04 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
23
checked on 01-abr-2024
WEB OF SCIENCETM
Citations
21
checked on 25-feb-2024
Page view(s)
310
checked on 23-abr-2024
Download(s)
326
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.