Electronic structure of high- and low-temperature c(2x2)-Na/Al(001) phases from angle-scanned ultraviolet photoemission

被引：14

作者：

Fasel, R ^{[1
]}

Aebi, P ^{[1
]}

Agostino, RG ^{[1
]}

Schlapbach, L ^{[1
]}

Osterwalder, J ^{[1
]}

机构：

[1] UNIV ZURICH IRCHEL,INST PHYS,CH-8057 ZURICH,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.54.5893

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic states of Na on Al(001) have been studied by angle-scanned ultraviolet photoelectron spectroscopy. In the initial stage of Na deposition at room temperature, the Al(001) sp surface state is found to be rapidly quenched. From the linear decrease in intensity with coverage, the scattering cross section for electrons in this zone-center surface state scattering off Na surface impurities has been determined. For the two structurally different c(2X2) phases formed at low temperature and at room temperature, the surface-state dispersions along the <(Gamma)over bar> (M) over bar and <(Gamma)over bar> (X) over bar directions of the surface Brillouin zone have been measured and compared to the corresponding results from the clean Al(001) surface. Opposite energy shifts and distinctly different effective masses have been found for the electronic states in the two c(2X2) phases.

引用

页码：5893 / 5900

页数：8

共 27 条

[1] TEMPERATURE-DEPENDENT LOCAL GEOMETRIES IN THE SYSTEM AL(100)-C(2X2)-NA - A SURFACE EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE STUDY [J].