|Author||Lien, W. H. ♦ Phillips, N. E.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||METALS, CERAMICS, AND OTHER MATERIALS ♦ CESIUM ♦ ELASTICITY ♦ ELECTRONS ♦ ENERGY LEVELS ♦ ERRORS ♦ FERMI GAS ♦ FERMI LEVEL ♦ FERMIONS ♦ INTERACTIONS ♦ LATTICES ♦ LOW TEMPERATURE ♦ MEASURED VALUES ♦ NUMERICALS ♦ PHONONS ♦ POTASSIUM ♦ RUBIDIUM ♦ SPECIFIC HEAT|
|Abstract||The heat capacities of potassium, rubidium, and cesium were measured between 0.2 and 4.2 deg K. The thermal effective mass ratios are 1.25, 1.26, and 1.43, respectively. For potassium and rubidium these quantities are in reasonable agreement with theoretical estimates of the effects of band structure, electron-electron interactions, and electron-phonon interaction. The trends of the calculated and measured values suggest that the energy-band calculations overestimate the distortion of the Fermi surface in cesium. For potassium the elastic constants are known and can be compared with the observed T/sup 3/ term in the lattice heat capacity. The agreement is within the expected experimental errors. The T/sup 5/ term, however, does not agree with calculations based on a model that includes only first- and second-neighbor interactions. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Univ. of California, Berkeley|
|Publisher Place||United States|
|Technical Publication No.||UCRL-8990(Rev.)|
|Organization||Univ. of California, Berkeley|
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