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  4. alpha-gamma transition in metallic Ce studied by resonant x-ray spectroscopies
 
research article

alpha-gamma transition in metallic Ce studied by resonant x-ray spectroscopies

Grioni, M.  
•
Palenzona, A.
•
Taguchi, M.
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2004
Physical Review B

We performed bulk-sensitive x-ray absorption (XAS) in the partial fluorescence yield (PFY) mode, and resonant x-ray emission (RXES) measurements of the solid solution Sc (7 at.%):Ce at the Ce L-3 (2p-->5d) and M-4,M-5 (3d-->4f) absorption edges. We deduce an increasing 4f-band hybridization from the gamma-phase stable at room temperature to the low-temperature alpha-Ce, consistent with the "Kondo collapse" scenario for the transition. The enhanced intrinsic resolution of PFY-XAS allows us to resolve the elusive three-peak structure predicted by theory. Thanks to the selective enhancement typical of RXES, we could estimate the small but non-negligible contribution of the f(2) configuration in the hybrid ground state, and its change in the two phases. The linear dichroism effect in the M-4,M-5 RXES spectra is consistent with the observed hybridization of 4f and conduction states.

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Type
research article
DOI
10.1103/PhysRevB.70.085112
Web of Science ID

WOS:000223716700034

Author(s)
Grioni, M.  
Palenzona, A.
Taguchi, M.
Annese, E.
Ghiringhelli, G.
Tagliaferri, A.
Brookes, N. B.
Neisius, T.
Braicovich, L.
Dallera, C.
Date Issued

2004

Published in
Physical Review B
Volume

70

Article Number

085112

Subjects

Emission-Spectroscopy

•

Electronic-Structure

•

Polarization Dependence

•

State Properties

•

Ground-State

•

Cerium

•

Photoemission

•

Scattering

•

Spectra

•

Systems

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSE  
Available on Infoscience
April 7, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/49192
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