Angular-resolved study of secondary-electron emission from NEA diamond surfaces

M. Lübbe; D. A. Evans; T. U. Kampen; K. Okano; D. R.T. Zahn

doi:10.1016/s0925-9635(99)00084-9

Angular-resolved study of secondary-electron emission from NEA diamond surfaces

M. Lübbe^*, D. A. Evans, T. U. Kampen, K. Okano, D. R.T. Zahn

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We studied the angular distribution of secondary electrons emitted from different diamond surfaces using angular-resolved ultraviolet photoelectron spectroscopy (ARUPS). On a boron-doped lib type natural diamond, smooth and clean (111) surfaces were prepared by polishing and vacuum annealing. A negative electron affinity (NEA) was established by applying cesium at different coverages. The intensity of the secondary-electron emission, which originates from thermalized electrons collected in the conduction-band minimum, as well as the low-energy cutoff of the spectra were studied for different emission angles with respect to the sample surface and for different cesium coverages. While the intensity is peaked in the direction normal to the sample surface, we observed an upward dispersion of the low-energy cutoff of the spectra for off-normal detection angles. A theoretical model for this behavior is given. The same effects are evident to a lower extent for a polycrystalline, boron-doped, chemical vapor deposited (CVD) diamond film.

Original language	English
Pages (from-to)	1485-1489
Number of pages	5
Journal	Diamond and Related Materials
Volume	8
Issue number	8-9
DOIs	https://doi.org/10.1016/s0925-9635(99)00084-9
Publication status	Published - Aug 1999

Keywords

Band structure
Diamond
Electron spectroscopy
Surface

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@article{51ad95d6935642b5bfe3229836adeb6d,

title = "Angular-resolved study of secondary-electron emission from NEA diamond surfaces",

abstract = "We studied the angular distribution of secondary electrons emitted from different diamond surfaces using angular-resolved ultraviolet photoelectron spectroscopy (ARUPS). On a boron-doped lib type natural diamond, smooth and clean (111) surfaces were prepared by polishing and vacuum annealing. A negative electron affinity (NEA) was established by applying cesium at different coverages. The intensity of the secondary-electron emission, which originates from thermalized electrons collected in the conduction-band minimum, as well as the low-energy cutoff of the spectra were studied for different emission angles with respect to the sample surface and for different cesium coverages. While the intensity is peaked in the direction normal to the sample surface, we observed an upward dispersion of the low-energy cutoff of the spectra for off-normal detection angles. A theoretical model for this behavior is given. The same effects are evident to a lower extent for a polycrystalline, boron-doped, chemical vapor deposited (CVD) diamond film.",

keywords = "Band structure, Diamond, Electron spectroscopy, Surface",

author = "M. L{\"u}bbe and Evans, {D. A.} and Kampen, {T. U.} and K. Okano and Zahn, {D. R.T.}",

note = "Funding Information: Financial support by the Deutsche Forschungsgemeinschaft Innovationskolleg {\textquoteleft}Methoden und Materialsysteme f{\"u}r den Nanometerbereich{\textquoteright} is gratefully acknowledged. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "1999",

month = aug,

doi = "10.1016/s0925-9635(99)00084-9",

language = "English",

volume = "8",

pages = "1485--1489",

journal = "Diamond and Related Materials",

issn = "0925-9635",

publisher = "Elsevier",

number = "8-9",

}

TY - JOUR

T1 - Angular-resolved study of secondary-electron emission from NEA diamond surfaces

AU - Lübbe, M.

AU - Evans, D. A.

AU - Kampen, T. U.

AU - Okano, K.

AU - Zahn, D. R.T.

N1 - Funding Information: Financial support by the Deutsche Forschungsgemeinschaft Innovationskolleg ‘Methoden und Materialsysteme für den Nanometerbereich’ is gratefully acknowledged. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 1999/8

Y1 - 1999/8

N2 - We studied the angular distribution of secondary electrons emitted from different diamond surfaces using angular-resolved ultraviolet photoelectron spectroscopy (ARUPS). On a boron-doped lib type natural diamond, smooth and clean (111) surfaces were prepared by polishing and vacuum annealing. A negative electron affinity (NEA) was established by applying cesium at different coverages. The intensity of the secondary-electron emission, which originates from thermalized electrons collected in the conduction-band minimum, as well as the low-energy cutoff of the spectra were studied for different emission angles with respect to the sample surface and for different cesium coverages. While the intensity is peaked in the direction normal to the sample surface, we observed an upward dispersion of the low-energy cutoff of the spectra for off-normal detection angles. A theoretical model for this behavior is given. The same effects are evident to a lower extent for a polycrystalline, boron-doped, chemical vapor deposited (CVD) diamond film.

AB - We studied the angular distribution of secondary electrons emitted from different diamond surfaces using angular-resolved ultraviolet photoelectron spectroscopy (ARUPS). On a boron-doped lib type natural diamond, smooth and clean (111) surfaces were prepared by polishing and vacuum annealing. A negative electron affinity (NEA) was established by applying cesium at different coverages. The intensity of the secondary-electron emission, which originates from thermalized electrons collected in the conduction-band minimum, as well as the low-energy cutoff of the spectra were studied for different emission angles with respect to the sample surface and for different cesium coverages. While the intensity is peaked in the direction normal to the sample surface, we observed an upward dispersion of the low-energy cutoff of the spectra for off-normal detection angles. A theoretical model for this behavior is given. The same effects are evident to a lower extent for a polycrystalline, boron-doped, chemical vapor deposited (CVD) diamond film.

KW - Band structure

KW - Diamond

KW - Electron spectroscopy

KW - Surface

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U2 - 10.1016/s0925-9635(99)00084-9

DO - 10.1016/s0925-9635(99)00084-9

M3 - Article

AN - SCOPUS:0032594305

SN - 0925-9635

VL - 8

SP - 1485

EP - 1489

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 8-9

ER -

Angular-resolved study of secondary-electron emission from NEA diamond surfaces

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Keywords

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