| 1. |
- Karis, O., et al.
(författare)
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Observation of short- and long-range hybridization of a buried Cu monolayer in Ni
- 2000
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Ingår i: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 62:24, s. R16239-R16242
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Tidskriftsartikel (refereegranskat)abstract
- The electronic structure of a Cu monolayer buried in Ni fcc(100) is studied by means of x-ray emission and absorption spectroscopies in combination with first principles calculations. The local character of the x-ray probes allows us to investigate changes in the chemical interaction for these ultrathin film systems. In comparison to bulk Cu, the occupied d states of a buried Cu monolayer, as mapped in the x-ray emission spectrum, remain mostly unaltered. The absorption spectrum on the other hand shows that the empty states of the buried Cu monolayer are modified, and instead resemble the unoccupied electronic density of bulk Ni. These findings agree well with our first principle electronic structure calculations and the results are interpreted in terms of short- and long-range hybridization.
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| 2. |
- Karis, O, et al.
(författare)
-
Probing surface states of Cu/Ni thin films using x-ray absorption spectroscopy
- 2001
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 63:11
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Tidskriftsartikel (refereegranskat)abstract
- Surface and interface properties of Cu thin films (1–4 monolayers) deposited on Ni(100) have been extracted by means of x-ray absorption spectroscopy and analyzed in combination with ab initio density-functional calculations. An unoccupied Cu surface state is identified in an x-ray absorption spectra and studied as a function of film thickness. Experimental data is supported by calculations of the layer-resolved density of states and the results from this combined theoretical-experimental effort show that the surface state is almost entirely located on the atomic layer closest to the vacuum. Our results also indicate strong hybridization between unoccupied states at the Cu/Ni interface boundary.
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| 3. |
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| 4. |
- Weinelt, M., et al.
(författare)
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Resonant Photoemission at the 2p Edges of Ni: Resonant Raman and Interference Effects
- 1997
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 78:5, s. 967-970
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Tidskriftsartikel (refereegranskat)abstract
- Unambiguous evidence for resonant photoemission in Ni is presented. Interference effects are identified at the 2p edges for the valence band and the 6 eV satellite. A rapid transition from a resonant Raman to an Auger-like regime shows that the core-excited states above threshold are not localized enough to significantly enhance the photoemission intensity, implying a large fraction of incoherent intensity. The results indicate that the appearance of interference effects does not require strong localization of the intermediate state.
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| 5. |
- Weinelt, M, et al.
(författare)
-
Resonant photoemission at the 2p edges of Ni: Resonant Raman and interference effects
- 1997
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Ingår i: PHYSICAL REVIEW LETTERS. - 0031-9007. ; 78:5, s. 967-970
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Unambiguous evidence for resonant photoemission in Ni is presented. Interference effects are identified at the 2p edges for the valence band and the 6 eV satellite. A rapid transition from a resonant Raman to an Auger-like regime shows that the core-excit
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| 6. |
- Karis, O, et al.
(författare)
-
Observation of short- and long-range hybridization of a buried Cu monolayer in Ni
- 2000
-
Ingår i: PHYSICAL REVIEW B. - 0163-1829. ; 62:24, s. R16239-R16242
-
Tidskriftsartikel (refereegranskat)abstract
- The electronic structure of a Cu monolayer buried in Ni fcc(100) is studied by means of x-ray emission and absorption spectroscopies in combination with first principles calculations. The local character of the x-ray probes allows us to investigate change
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| 7. |
- Magnuson, Martin, 1965-, et al.
(författare)
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Coherent and Incoherent Processes in resonant Photoemission
- 1997
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Ingår i: Advanced Light Source. - California, USA : Ernest Orlando Lawrence Berkeley National Laboratory, University of California Berkeley. ; 65:2, s. 159-167
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Bokkapitel (populärvet., debatt m.m.)
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| 8. |
- Martensson, N, et al.
(författare)
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Coherent and incoherent processes in resonant photoemission
- 1997
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Ingår i: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING. - 0947-8396. ; 65:2, s. 159-167
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The basis for resonant photoemission is discussed in connection with data for a physisorption system, Ar/Pt(111) and a 3d transition metal, Ni(100). For Ar/Pt(111) the quasi-localized character of the intermediate state leads to two types of features in t
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| 9. |
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