DEPOLARIZATION AND METALLIZATION IN ALKALI-METAL OVERLAYERS

被引：56

作者：

PERSSON, BNJ ^{[1
]}

ISHIDA, H ^{[1
]}

机构：

[1] UNIV TOKYO, INST SOLID STATE PHYS, MINATO KU, TOKYO 106, JAPAN

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.42.3171

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the level shift of the alkali-metal valence resonance with increasing adatom coverage with a simple formula based on the Gurney model in which alkali-metal adatoms interact only via the long-range dipole interaction. The calculated level shift is in good agreement with the results of first-principles electronic-structure calculations below the onset of the overlayer metallization, but breaks down for higher where the orbital overlap among nearby adatoms plays a crucial role in the electronic properties of the overlayer. Our result is also in good accord with the recent experimental data for K/Al(111) at low K coverage. © 1990 The American Physical Society.

引用

页码：3171 / 3174

页数：4

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