Evidence for three surface components in the 3d core-level photoemission spectra of Ge(100)-(2x1) surface

被引：40
作者：
Goldoni, A
Modesti, S
Dhanak, VR
Sancrotti, M
Santoni, A
机构：
[1] IST NAZL FIS MAT,LAB TECNOL AVANZATE SUPERFICI & CATALISI,I-34012 TRIESTE,ITALY
[2] UNIV TRIESTE,DIPARTIMENTO FIS,I-34100 TRIESTE,ITALY
[3] UNIV LIVERPOOL,INTERDISCIPLINARY RES CTR SURFACE SCI,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND
[4] ENTE NAZL EUETGIA ATTERUAT,SETTORE NUOVI MAT,I-00100 ROME,ITALY
[5] POLITECN MILAN,I-20133 MILAN,ITALY
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.54.11340
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The 3d surface core-level shifts of the clean Ge(100)(2x1) surface have been investigated at 300 K by photoemission. A previously unobserved (to our knowledge) shifted component at about +0.19 eV relative to the bulk emission has been clearly identified and associated with dimer down-atom emission. The binding energy difference of 0.72 eV between dimer down-atom and dimer up-atom 3d core levels, consistent with a charge transfer similar to that occurring in the Si(100)-(2x1) surface, supports the so-called ionic model of the Ge(100)-(2x1) buckled-dimer reconstruction.
引用
收藏
页码：11340 / 11345
页数：6
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