The role of atomic hydrogen and its influence on the enhancement of secondary electron emission from C(001) surfaces

被引：40

作者：

Humphreys, TP ^{[1
]}

Thomas, RE ^{[1
]}

Malta, DP ^{[1
]}

Posthill, JB ^{[1
]}

Mantini, MJ ^{[1
]}

Rudder, RA ^{[1
]}

Hudson, GC ^{[1
]}

Markunas, RJ ^{[1
]}

Pettenkofer, C ^{[1
]}

机构：

[1] HAHN MEITNER INST BERLIN GMBH,D-1000 BERLIN,GERMANY

来源：

APPLIED PHYSICS LETTERS | 1997年 / 70卷 / 10期

关键词：

D O I：

10.1063/1.118545

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The role of chemisorbed hydrogen in the enhancement of low-energy electron emission from natural type IIb C(001) diamond surfaces has been investigated. A hydrogen induced low-energy emission peak, whose intensity was found to be a linear function of surface coverage, was observed. The direct observation of emission from vacuum level states in the photoemission spectra has determined a negative electron affinity of similar to 0.4 eV for the hydrogenated C(001)-1x1 surface. Constant initial states photoemission has unambiguously identified the electron emission process with the escape of electrons from bulk electron states at the conduction-band minimum. (C) 1997 American Institute of Physics.

引用

页码：1257 / 1259

页数：3

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