| 1. |
- Uhrberg, R I G, et al.
(författare)
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Well-Known "Surface State" on Si(111)2×1 Identified as a Bulk Contribution
- 1984
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 52:25, s. 2265-2268
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Tidskriftsartikel (refereegranskat)abstract
- Using polarization-dependent angle-resolved photoemission we show that two dominating structures in the photoemission spectra are due to direct transitions from the uppermost two valence bands in silicon. The final-state band for these transitions at photon energies 10.2-21.2 eV is found to have free-electron-like dispersion. Our results imply that that threefold-symmetry emission often assigned to back-bond surface states on Si(111)2×1 is really due to bulk photoemission.
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| 2. |
- Hammar, Mattias, 1961-, et al.
(författare)
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Scanning tunnelling microscopy studies of Pt80Fe 20(110)
- 1993
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Ingår i: Journal of Physics: Condensed Matter. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 5:18, s. 2837-2842
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Tidskriftsartikel (refereegranskat)abstract
- Results of scanning tunnelling microscopy (STM) show that two different kinds of surface structures coexist on the (110) surface of Pt 80Fe20. The predominant structure corresponds well to the missing row type (1*2) reconstruction previously observed on, for example Pt(110), whereas the minority domains show a faintly buckled structure with approximately (1*1) geometry. Based on the STM images, the authors propose that the two domains have different surface chemical compositions and correspond to two different metallurgical phases known for the PtFe system at this composition.
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| 3. |
- Kurtz, Richard L., et al.
(författare)
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Core-excitoninduced desorption from MgO
- 1987
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Ingår i: Physical Review B (Condensed Matter). - 0163-1829. ; 35:14, s. 7794-7797
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Tidskriftsartikel (refereegranskat)abstract
- Core-exciton-induced desorption of O and H from MgO(100) and MgO(111) has been observed using photon excitation energies spanning the O K edge. Electron-yield data from partially oxidized Mg implies that these states are localized in the near-surface region. O and H desorption results from the decay of different O core-exciton states as well as the states produced by interband transitions. The O excitonic levels are interpreted in terms of their related atomic origin.
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