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Photoemission and d...
Photoemission and density functional theory study of Ge(100) : Clean surface and Yb-induced (2x4) reconstruction
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Kuzmin, M. (författare)
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- Punkkinen, Marko Patrick John (författare)
- KTH,Tillämpad materialfysik
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Laukkanen, P. (författare)
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Perälä, R. E. (författare)
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Lang, J. J. K. (författare)
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Dahl, J. (författare)
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- Adell, Johan (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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Kokko, K. (författare)
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(creator_code:org_t)
- Elsevier, 2013
- 2013
- Engelska.
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Ingår i: Surface Science. - : Elsevier. - 0039-6028 .- 1879-2758. ; 615, s. 88-96
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Clean and metal-adsorbed (100) surfaces of group-IV semiconductors, such as Si and Ge, often exhibit electronically and structurally similar reconstructions. However, the fundamental bulk properties of group-IV materials can have an impact on particular features of such systems, which are related, e.g., to final-state relaxation in photoemission and thus determine their spectral line shape. Here we have studied Yb/Ge(100)(2 x 4) reconstruction as well as clean Ge(100) surface by high-resolution photoelectron spectroscopy and ab initio calculations. An atomic geometry of both surfaces is thoroughly investigated. A detailed analysis of Ge 3d core-level photoemission, atomic origins of surface-shifted components, and final-state screening effects is presented. In particular, it is demonstrated that the core-hole screening plays an essential role in Ge 3d measurements, and that its amount in the complete screening model correlates well with the core-level binding energy of respective Ge atoms in the initial state. The results are discussed in the proper context of related reconstructions on Si(100).
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Germanium
- Ytterbium
- Photoelectron spectroscopy
- DFT calculation
- Atomic structure
- Surface core-level shift
- Germanium
- Ytterbium
- Photoelectron spectroscopy
- DFT calculation
- Atomic structure
- Surface core-level shift
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