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Lattice vibrations and electronic transitions in the rare-earth metals: Praseodymium under pressure

  • Praseodymium was investigated by Raman spectroscopy under pressure. A negative pressure shift of the E2g mode is observed in the dhcp phase, which indicates that the initial structural sequence hcp→Sm−type→dhcp→fcc as a whole in the regular lanthanides is associated with a softening of this mode. The pressure response of the phonon modes, observed in the monoclinic and α-uranium phases, where 4fPraseodymium was investigated by Raman spectroscopy under pressure. A negative pressure shift of the E2g mode is observed in the dhcp phase, which indicates that the initial structural sequence hcp→Sm−type→dhcp→fcc as a whole in the regular lanthanides is associated with a softening of this mode. The pressure response of the phonon modes, observed in the monoclinic and α-uranium phases, where 4f bonding becomes important, is characteristic for anisotropic bonding properties.show moreshow less

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Metadaten
Author:Helmut Olijnyk, Walter A. GroßhansGND, Andrew P. Jephcoat
Publisher:American Physical Society
Year of Publication:2004
Page Number:9
Language:English
GND Keyword:Elektronik; Metallgitter; Übertragung
Parent Title (English):Physical Review Letters
Volume:93
Issue:25
Document Type:Article (reviewed)
Open Access:Frei zugänglich
Institutes:Bibliografie
Release Date:2019/10/17
Licence (German):License LogoEs gilt das UrhG
URL:https://www.researchgate.net/publication/8034610_Lattice_Vibrations_and_Electronic_Transitions_in_the_Rare-Earth_Metals_Praseodymium_under_Pressure
DOI:https://doi.org/10.1103/PhysRevLett.93.255505