2-DIMENSIONAL LOCALIZATION OF ELECTRONS AT INTERFACES

被引：42

作者：

LINGLE, RL ^{[1
]}

PADOWITZ, DF ^{[1
]}

JORDAN, RE ^{[1
]}

MCNEILL, JD ^{[1
]}

HARRIS, CB ^{[1
]}

机构：

[1] LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.72.2243

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evidence for electron localization in 2D at metal-dielectric interfaces is reported. A nondispersive peak, derived from the image-potential state and observed in angle-resolved two-photon photoemission, is assigned to localized excess electrons. The image electron on alkane monolayers is a free electron. Bilayers of chain or ring alkanes show both localized and delocalized states; electrons are localized on trilayer n-pentane. Bilayers and trilayers of neopentane show no localization. Our results link the geometry of adlayer molecules with localization of excess electrons at interfaces.

引用

页码：2243 / 2246

页数：4

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