High-energy resolution photoemission microspectroscopy: (1 1 1) domains featured by the Shockley and the image-potential states at a polycrystalline Cu surface

A photoemission microspectroscopy of 30 meV energy resolution and 0.3 μm lateral resolution has been applied to observe crystalline domains formed on a polycrystalline copper plate. Surface images based on the Shockley state specific to the (1 1 1) surface clearly showed many crystalline islands com...

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Bibliographic Details
Published in:Journal of electron spectroscopy and related phenomena 2004-07, Vol.137, p.193-197
Main Authors: Sugiyama, Takeharu, Masuda, Takuya, Aida, Makihide, Ueno, Nobuo, Munakata, Toshiaki
Format: Article
Language:English
Subjects:
High-resolution
Laser methods
Photoemission microscopy
Surface electronic phenomena
Surface states
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Summary:A photoemission microspectroscopy of 30 meV energy resolution and 0.3 μm lateral resolution has been applied to observe crystalline domains formed on a polycrystalline copper plate. Surface images based on the Shockley state specific to the (1 1 1) surface clearly showed many crystalline islands composed of the (1 1 1) surface. Similarly, surface images based on the unoccupied image-potential state were measured by employing two-photon photoemission spectroscopy. The high-energy resolution spectroscopy provides insight on the nm-scale surface morphology. The Shockley state was observed even on a poorly crystallized area, while the image-potential state was observed only on an area where mean (1 1 1) terrace length is sufficiently long.
ISSN:0368-2048
1873-2526
DOI:10.1016/j.elspec.2004.02.032