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Structure changes for Cu(111)/Li observed via discrete quantum well states

Anna Carlsson (Institutionen för teknisk fysik) ; Dan Claesson (Institutionen för teknisk fysik) ; Galina Katrich (Institutionen för teknisk fysik) ; Stig-Åke Lindgren (Institutionen för teknisk fysik) ; Lars Wallden (Institutionen för teknisk fysik)
Surface Review and Letters (0218-625X). Vol. 4 (1997), 6, p. 1233-1237.
[Artikel, refereegranskad vetenskaplig]

Via photoemission in the near UV from discrete quantum well states, four different types of atom rearrangements are observed for Cu(111)/Li. In the monolayer range a gradual energy shift reflects a gradual compression of the Li layer as more atoms are adsorbed. The onset of Li substitution and formation of a (2×2) structure when, at RT, monolayer Li coverage is exceeded is monitored via the appearance of a quantum well state characteristic of the new phase. A small energy shift indicates that, if it is cooled (170 K), the new structure is unstable with respect to Li adsorption. Finally, an energy downshift with increasing coverage observed for a state characteristic of 2 ML Li is ascribed to an increasing area for one-atomic-layer-high islands formed by Li atoms on top of the first full layer.

Denna post skapades 2009-04-25. Senast ändrad 2009-12-15.
CPL Pubid: 93000


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