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Surface phase trans...
Surface phase transition and electronic structure of c(5 root 2 x root 2)R45 degrees-Pb/Cu(100)
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Joco, V. (författare)
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Martinez-Blanco, J (författare)
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Segovia, P. (författare)
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- Thiagarajan, Balasubramanian (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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Fujii, J. (författare)
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Michel, E. G. (författare)
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(creator_code:org_t)
- Elsevier BV, 2006
- 2006
- Engelska.
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Ingår i: Proceedings of the 23th European Conference on Surface Science (Surface Science). - : Elsevier BV. - 0039-6028. ; 600:18, s. 3851-3855
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The c(5 root 2 x root 2)R45 degrees-Pb/Cu(100) surface phase is investigated by means of angle resolved ultraviolet photoemission and low energy electron diffraction in the temperature range between 300 and 550 K. We identify and characterize a temperature-induced surface phase transition at 440 K from the room temperature e(5 root 2 x root 2) R45 degrees phase to a (root 2 x root 2)R45 degrees structure with split superstructure spots. The phase transition is fully reversible and takes place before the two-dimensional melting of the structure at 520 K. The electronic structure of the split (root 2 x root 2)R45 degrees phase is characterized by a metallic free-electron like surface band. This surface band is backfolded with c(5 root 2 x root 2)R45 degrees periodicity phase at room temperature, giving rise to a surface band gap at the Fermi energy. We propose that a gain in electronic energy explains in part the stability of the c(5 root 2 x root 2)R45 degrees phase. (c) 2006 Elsevier B.V. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- electronic energy
- surface phase transition
- Pb
- photoemission
- Cu(100)
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)
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