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Journal Articles

Probing the coulomb interaction of the unconventional superconductor PuCoGa$$_5$$ by phonon spectroscopy

Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Janousova, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; et al.

Physical Review Letters, 96(23), p.237003_1 - 237003_4, 2006/06

https://doi.org/10.1103/PhysRevLett.96.237003
 Times Cited Count：26 Percentile：73.25(Physics, Multidisciplinary)

The phonon dispersion curves of the superconductor PuCoGa$$_{5}$$ were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ${it ab initio}$ lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U$${simeq}$$ 3 eV among 5$$f$$ electrons is taken into account.

Journal Articles

Induced orbital polarization of Ga ligand atoms in U$$T$$Ga$$_5$$ ($$T$$=Ni, Pd, and Pt)

Kuzushita, Kaori*; Ishii, Kenji; Wilkins, S. B.*; Janousova, B.*; Inami, Toshiya; Owada, Kenji; Tsubota, Masami; Murakami, Yoichi; Kaneko, Koji; Metoki, Naoto; et al.

Physical Review B, 73(10), p.104431_1 - 104431_5, 2006/03

https://doi.org/10.1103/PhysRevB.73.104431
 Times Cited Count：8 Percentile：36.77(Materials Science, Multidisciplinary)

We report a resonant X-ray scattering study of antiferromagnetic uranium compounds U$$T$$Ga$$_5$$ ($$T$$=Ni, Pd, and Pt) at the Ga $$K$$-edge. A large resonant signal is observed below the N$'e$el temperatures. The azimuth dependence in both $$pi$$-$$pi'$$ and $$pi$$-$$sigma'$$ polarization channels establishes that the resonant signal has the symmetry of the magnetic dipole. This resonance with the band electrons is interpreted within a semi-localized model as an orbital polarization of the Ga $$4p$$ states induced through strong hybridization with U $$5f$$ valence level. These results demonstrate that resonant magnetic X-ray scattering at the anions, taken in combination with symmetry arguments, can be used to determine the configuration of the U $$5f$$ moments and provide information about the hybridization.

Oral presentation

Resonant X-ray scattering in NpTGa$$_5$$ (T=Co and Rh); Experiment and theory

Janousova, B.*; Di Matteo, S.*; Wilkins, S. B.*; Caciuffo, R.*; Paix$~a$o, J. A.*; Honda, Fuminori; Metoki, Naoto; Colineau, E.*; Lander, G. H.

no journal, , 

no abstracts in English

Oral presentation

Phonon in ATGa$$_{5}$$(A:U, Pu)

Metoki, Naoto; Kaneko, Koji; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; et al.

no journal, , 

no abstracts in English

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