Electron confinement in surface states on a stepped gold surface revealed by angle-resolved photoemission

STM images show that vicinal Au(788) surfaces are made up of a uniform array of (111)-oriented terraces of similar width (∼3.8nm). This uniformity makes it possible to study the electronic structure of the resulting step superlattice by angle-resolved photoemission. We show that for this terrace arr...

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Detalhes bibliográficos
Autores: Mugarza, Aitor, Mascaraque, Arantzazu, Pérez-Dieste, Virginia, Repain, V., Rousset, S., García de Abajo, Francisco Javier, Ortega, J. Enrique
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2001
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/224563
Acesso em linha:http://hdl.handle.net/10261/224563
Access Level:acceso abierto
Descrição
Resumo:STM images show that vicinal Au(788) surfaces are made up of a uniform array of (111)-oriented terraces of similar width (∼3.8nm). This uniformity makes it possible to study the electronic structure of the resulting step superlattice by angle-resolved photoemission. We show that for this terrace array the surface state appears to be broken up into one-dimensional quantum-well levels, indicating total electron confinement within the terraces. The angular resolution allows the probability density of the terrace quantum well state to be mapped in reciprocal space, complementing nicely the wave function measured in real space by STM.

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