Krebs's Model for the Alkali Metals and the Screening Parameter
- 1 January 1965
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 9 (2) , 351-356
- https://doi.org/10.1002/pssb.19650090206
Abstract
The specific heats of sodium, potassium, rubidium, and caesium are calculated on the basis of Krebs's model (1). It is found that the theoretical θ−T curves agree with experiment if the screening parameter is taken as an adjustable constant. The deduced values of this parameter show a gradual change from the Bohm‐Pines to the Thomas‐Fermi form during the transition from sodium to caesium. The model, however, fails to give agreement in the case of lithium. Since the measured elastic constants of this metal do not give the correct value of θ0, the discrepancy for this case may be due to the errors in measurement.Keywords
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