Electronic energy band structure of actinide metals and intermetallics

Conference · Wed Jan 01 00:00:00 EST 1975

OSTI ID:4172062

Koelling, D D; Freeman, A J

The behavior of the 5f electrons as the crucial factor in determining the electronic properties of materials containing actinides is discussed. Whether these electrons will be localized or itinerant depends on the relative size of the Coulomb correlation and the near-neighbor interaction (bandwidth) terms. Evidence from optical reflectivity and de Haas-van Alphen measurements which show that the f-states are itinerant in the light actinide metals is examined. The mechanisms by which this occurs are studied and it is shown that the dominant feature is a direct f-f interaction on neighboring sites. It is as a result of this dominance that correlations with actinide separation are found for the observed superconducting and magnetic properties. Since materials which appear as exceptions to this correlation are significant as systems where the direct f-f interaction is not the dominant term, we discuss, as illustrative examples, the L1$sub 2$ crystal structure materials involving uranium. The materials considered in detail are URh$sub 3$ and UIr$sub 3$ for which an experimental determination of the Fermi surface has been made. In these systems, the dominant interaction is found to be the formation of a d-f bond. (auth)

• Research Organization: Argonne National Lab., Ill. (USA)
• DOE Contract Number: W-31-109-ENG-38
• NSA Number: NSA-33-001238
• OSTI ID: 4172062
• Report Number(s): CONF-750915-13
• Resource Relation: Conference: 5. international conference on plutonium and other actinides, Baden-Baden, F.R. Germany, 10 Sep 1975; Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N50230* -Metals
Ceramics
& Other Materials-Metals & Alloys-Properties
Structure & Phase Studies
N66200 -Physics (Low Temperature)-Superconductivity
360102* -Materials-Metals & Alloys-Structure & Phase Studies
*ACTINIDES- ELECTRONIC STRUCTURE
*URANIUM ALLOYS- ELECTRONIC STRUCTURE
AMERICIUM
BAND THEORY
BERKELIUM
CERIUM
CHEMICAL BONDS
CORRELATIONS
COULOMB ENERGY
FCC LATTICES
FERMI LEVEL
GADOLINIUM
HAMILTONIANS
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
PLUTONIUM
REVIEWS
SUPERCONDUCTIVITY
THORIUM
URANIUM
URANIUM BORIDES
URANIUM CARBIDES
URANIUM DIOXIDE
URANIUM IODIDES
URANIUM NITRIDES
URANIUM PHOSPHATES
URANIUM PHOSPHIDES
URANIUM SELENIDES
URANIUM SULFIDES
URANIUM TELLURIDES