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Effective Pair Potential and Thermodynamic Properties of Liquid Noble Metals
Author(s) -
Joarder R. N.,
Rao R. V. Gopala
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221090114
Subject(s) - pseudopotential , thermodynamics , noble metal , gibbs free energy , perturbation (astronomy) , pair potential , noble gas , dielectric , wave function , condensed matter physics , materials science , metal , physics , atomic physics , quantum mechanics , optoelectronics , metallurgy
The variational method associated with the Gibbs‐Bogolyubov inequality in the thermodynamic perturbation method allows the determination of the thermodynamic properties of liquid noble metals. The interionic potentials are generated from the energy‐wave‐number characteristics obtained from a model pseudopotential in conjunction with the dielectric response function of the interacting electron gas. The variation of the packing density with volume and temperature shows a relatively hard core pseudoatom and it is shown that under pressure, along the melting line, the packing density actually increases for noble metals unlike the simple metals. In addition, the results compare favourably with experiments as well as the calculations of Moriarty based on Harrison's generalised transition metal pseudopotential.