Shock anomaly and s-d transition in high-pressure lanthanum

Conference · Thu Jul 23 00:00:00 EDT 1981

OSTI ID:6199741

McMahan, A K; Skriver, H L; Johansson, B

Linear-muffin-tin orbital calculations of the band structure and pressure-volume isotherms for fcc La, both at zero and finite temperatures. The calculated bulk modulus shows a rapid stiffening in the range from 40 to 50% compression, due to termination of the 6s to 5d electronic transition. When combined with a simple Slater model analysis, these results yield a temperature dependent peak in the lattice Grueneisen parameter. Experimental confirmation of this peak is found in an anomalous stiffening seen in the shock compression data for La, and it may also have some bearing on the observed saturation of the superconducting transition temperature in La around 200 kbar.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Research Establishment Risoe, Roskilde (Denmark); Aarhus Univ. (Denmark). Inst. of Physics
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6199741
• Report Number(s): UCRL-86484; CONF-810828-2; ON: DE81027659; TRN: 81-015196
• Resource Relation: Conference: Conference on high pressure physics, Bad Honnef, F.R. Germany, Aug 1981
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
LANTHANUM
BAND THEORY
ENERGY-LEVEL TRANSITIONS
BULK DENSITY
D STATES
EQUATIONS OF STATE
FCC LATTICES
PRESSURE DEPENDENCE
S STATES
SHOCK WAVES
TEMPERATURE DEPENDENCE
VERY HIGH PRESSURE
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DENSITY
ELEMENTS
ENERGY LEVELS
EQUATIONS
METALS
PHYSICAL PROPERTIES
RARE EARTHS
360102* - Metals & Alloys- Structure & Phase Studies
656000 - Condensed Matter Physics