Controlled interaction of surface quantum-well electronic states.
Nano Lett
; 13(12): 6130-5, 2013.
Article
en En
| MEDLINE
| ID: mdl-24245663
We report on the construction of well-defined surface quantum well arrangements by combining self-assembly protocols and molecular manipulation procedures. After the controlled removal of individual porphyrin molecules from dense-packed arrays on Ag(111), the surface state electrons are confined at the bare silver patches. These act as quantum wells that show well-defined unoccupied bound surface states. Scanning tunneling spectroscopy and complementary boundary element method calculations are performed to characterize the interaction between the bound states of adjacent quantum wells and reveal a hybridization of wave functions resulting in bonding and antibonding states. The interwell coupling can be tuned by the deliberate choice of the molecules acting as potential barriers. The fabrication method is shown to be ideally suited to engineer specific configurations as one-dimensional chains or two-dimensional artificial molecules.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Plata
/
Propiedades de Superficie
/
Electrones
Idioma:
En
Revista:
Nano Lett
Año:
2013
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Estados Unidos