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

被引:1
作者
Carlsson, A [1 ]
Claesson, D
Katrich, G
Lindgren, SA
Walden, L
机构
[1] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden
[2] Ukrainian Acad Sci, Inst Phys, UA-252650 Kiev 28, Ukraine
关键词
D O I
10.1142/S0218625X97001590
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 x 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.
引用
收藏
页码:1233 / 1237
页数:5
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