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Hidden surface states on pristine and H-passivated Ni(111): Angle-resolved photoemission and density-functional calculations


Lobo-Checa, J; Okuda, T; Hengsberger, M; Patthey, L; Greber, T; Blaha, P; Osterwalder, J (2008). Hidden surface states on pristine and H-passivated Ni(111): Angle-resolved photoemission and density-functional calculations. Physical Review B, 77(7):075415-8pp.

Abstract

By means of angle-resolved photoemission, we have uncovered surface related states on the pristine and hydrogen saturated Ni(111) surfaces. Near normal emission spectra were recorded at room temperature as a function of photon energy. A hidden Tamm surface state is found on the clean Ni(111) surface at a binding energy of ~1.19 eV, completely masked by the Lambda1 bulk d band. The existence of this surface state is in agreement with the density-functional theory calculations presented here. On the other hand, a surface state related to hydrogen adsorbed on the surface has been identified at a binding energy of ~0.22 eV. Under hydrogen exposure, it grows at the same rate as the three other surface states of the clean Ni(111) vanish.

Abstract

By means of angle-resolved photoemission, we have uncovered surface related states on the pristine and hydrogen saturated Ni(111) surfaces. Near normal emission spectra were recorded at room temperature as a function of photon energy. A hidden Tamm surface state is found on the clean Ni(111) surface at a binding energy of ~1.19 eV, completely masked by the Lambda1 bulk d band. The existence of this surface state is in agreement with the density-functional theory calculations presented here. On the other hand, a surface state related to hydrogen adsorbed on the surface has been identified at a binding energy of ~0.22 eV. Under hydrogen exposure, it grows at the same rate as the three other surface states of the clean Ni(111) vanish.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2008
Deposited On:10 Feb 2009 08:28
Last Modified:05 Apr 2016 12:49
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.77.075415

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