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Metal-Nonmetal Transitions in Expanded Fluids

1982; Oxford University Press; Volume: 72; Linguagem: Inglês

10.1143/ptps.72.1

0375-9687

Fumiko Yonezawa, Tohru Ogawa,

High-pressure geophysics and materials

The main purpose of the present paper is to study the relationship between the electronic and thermodynamic properties of expanded metallic fluids in the vicinity of the liquid-gas critical point. In particular, it is shown that a theoretical analysis naturally predicts the possible existence of two different kinds of thermodynamic phase transitions—first the atomic gas-to-liquid condensation for which electrons play no explicit role, and secondly the electron-induced first-order phase transition accompanying a metal-nonmetal transition. The thermodynamic behaviours of fluids in the supercritical region are discussed in connection with these two transitions.