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Abstract

We report photoemission results on alpha- and delta- Pu using a laser plasma light source (LPLS) as well as He light as the exciting radiation. The LPLS is a pseudo-continuum tuneable light source with intensities rivalling some second-generation synchrotrons. Both phases of Pu display a narrow, temperature-independent, 5f-related feature at the Fermi energy, which is narrower in delta-Pu than in alpha-Pu, suggestive of possible heavy-fermion-like behaviour. In both alpha-Pu and delta-Pu the photon-energy dependence of this feature suggests some 6d admixture, albeit somewhat smaller in delta-Pu. In this respect it differs qualitatively from Ce and U heavy fermions.

Additional information

Authors: ARKO A, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US);JOYCE J, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US);WILLS J, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US);LASHLEY J, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US);WASTIN F, European Commission, JRC-Institute for Transuranium Elements, P.O. Box. 2340, D-76125 Karlsruhe (DE);REBIZANT J, European Commission, JRC-Institute for Transuranium Elements, P.O. Box. 2340, D-76125 Karlsruhe (DE)
Bibliographic Reference: Article: Physical Review B Condensed Matter 62, No. 3 (2000), pp. 1773-1779
Record Number: 200013043 / Last updated on: 2001-01-24
Category: PUBLICATION
Original language: en
Available languages: en