Ce 4f electron in CeH2.1, CeH2.4, CeAl2, CePd3, CeRh3, and CeRu2: A photoemission study using synchrotron radiation

D. J. Peterman, J. H. Weaver, Mark Croft, D. T. Peterson

Research output: Contribution to journalArticle

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Abstract

We present a photoemission study of the Ce 4f electron in materials which range from the localized, trivalent (4f1) compounds CeH2 and CeAl2 to the reportedly tetravalent (4f0) compounds CeRh3 and CeRu2. Using synchrotron radiation in the photon energy range of 10h140 eV, we compare the valence-band emission of the Ce compounds with that of the analogous La compounds, paying particular attention to resonant behavior near the 4d4f transition threshold. In addition, we use the partial photoelectron yield as an indicator of the degree of 4f localization as well as occupation. We find no evidence of a change in 4f occupation across the series CeH2.1CeRu2. Instead, we find an increase in the width of the 4f emission and an increase in the effect of the 4f electron on the remaining band states. We conclude that the apparent valence changes in these particular compounds are due primarily to hybridization effects, in agreement with recent band-structure calculations.

Original languageEnglish (US)
Pages (from-to)808-818
Number of pages11
JournalPhysical Review B
Volume27
Issue number2
DOIs
StatePublished - Jan 1 1983

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Photoemission
Synchrotron radiation
synchrotron radiation
photoelectric emission
occupation
Electrons
Photoelectrons
Valence bands
Band structure
valence
electrons
Photons
photoelectrons
thresholds
photons
energy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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title = "Ce 4f electron in CeH2.1, CeH2.4, CeAl2, CePd3, CeRh3, and CeRu2: A photoemission study using synchrotron radiation",
abstract = "We present a photoemission study of the Ce 4f electron in materials which range from the localized, trivalent (4f1) compounds CeH2 and CeAl2 to the reportedly tetravalent (4f0) compounds CeRh3 and CeRu2. Using synchrotron radiation in the photon energy range of 10h140 eV, we compare the valence-band emission of the Ce compounds with that of the analogous La compounds, paying particular attention to resonant behavior near the 4d4f transition threshold. In addition, we use the partial photoelectron yield as an indicator of the degree of 4f localization as well as occupation. We find no evidence of a change in 4f occupation across the series CeH2.1CeRu2. Instead, we find an increase in the width of the 4f emission and an increase in the effect of the 4f electron on the remaining band states. We conclude that the apparent valence changes in these particular compounds are due primarily to hybridization effects, in agreement with recent band-structure calculations.",
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Ce 4f electron in CeH2.1, CeH2.4, CeAl2, CePd3, CeRh3, and CeRu2 : A photoemission study using synchrotron radiation. / Peterman, D. J.; Weaver, J. H.; Croft, Mark; Peterson, D. T.

In: Physical Review B, Vol. 27, No. 2, 01.01.1983, p. 808-818.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ce 4f electron in CeH2.1, CeH2.4, CeAl2, CePd3, CeRh3, and CeRu2

T2 - A photoemission study using synchrotron radiation

AU - Peterman, D. J.

AU - Weaver, J. H.

AU - Croft, Mark

AU - Peterson, D. T.

PY - 1983/1/1

Y1 - 1983/1/1

N2 - We present a photoemission study of the Ce 4f electron in materials which range from the localized, trivalent (4f1) compounds CeH2 and CeAl2 to the reportedly tetravalent (4f0) compounds CeRh3 and CeRu2. Using synchrotron radiation in the photon energy range of 10h140 eV, we compare the valence-band emission of the Ce compounds with that of the analogous La compounds, paying particular attention to resonant behavior near the 4d4f transition threshold. In addition, we use the partial photoelectron yield as an indicator of the degree of 4f localization as well as occupation. We find no evidence of a change in 4f occupation across the series CeH2.1CeRu2. Instead, we find an increase in the width of the 4f emission and an increase in the effect of the 4f electron on the remaining band states. We conclude that the apparent valence changes in these particular compounds are due primarily to hybridization effects, in agreement with recent band-structure calculations.

AB - We present a photoemission study of the Ce 4f electron in materials which range from the localized, trivalent (4f1) compounds CeH2 and CeAl2 to the reportedly tetravalent (4f0) compounds CeRh3 and CeRu2. Using synchrotron radiation in the photon energy range of 10h140 eV, we compare the valence-band emission of the Ce compounds with that of the analogous La compounds, paying particular attention to resonant behavior near the 4d4f transition threshold. In addition, we use the partial photoelectron yield as an indicator of the degree of 4f localization as well as occupation. We find no evidence of a change in 4f occupation across the series CeH2.1CeRu2. Instead, we find an increase in the width of the 4f emission and an increase in the effect of the 4f electron on the remaining band states. We conclude that the apparent valence changes in these particular compounds are due primarily to hybridization effects, in agreement with recent band-structure calculations.

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