Metal-Nonmetal Transition in Liquids

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概要

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• A brief review is presented on the aspects and mechanism of the metal-nonmetal transition in the disordered systems. The electronic and thermodynamic properties are discussed for expanded Hg and dilute amalgams near the liquid-gas critical point. In expanded liquid Hg a metal-nonmetal (M-NM) transition occurs at density near 9g/cm^3 and anomalous behaviors are found in the thermodynamic properties such as equation-of-state and isothermal compressibility. At low densities substantial volume contraction and large increase in conductivity are brought about by the addition of a small amount of the elements with high valency such as Bi and Pb to expanded liquid Hg. The semiconductor-metal transition is discussed for liquid and amorphous Se-Te mixtures. In the liquid mixture, the transition from Se-like loosely packed to Te-like densely packed structure occurs by changing the temperature, pressure and Te content. The transition may be associated with the change in the short-range order around Te atoms. In amorphous Se_<0.8>Te_<0.2> mixture a reproducible sharp semiconductor-metal transition is found under pressure. The semiconductor-metal transition near the liquid-liquid critical point is also described for liquid Tl-Se mixtures in the Se-rich region. The liquid-liquid two-phase region is diminished by the application of pressure. It is suggested that the metal-nonmetal transitions observed in the liquid and amorphous systems are closely related to the structural changes.

• 理論物理学刊行会の論文
• 1982-12-20

著者

• Endo Hirohisa

  Department Of Physics Kyoto University

• Endo Hirohisa

  Department Of Infection Control And Prevention University Of Tokyo Hospital

関連論文

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• Structure and Electronic Properties of Te-Se Mixtures under High Pressure
• The Optical Properties of Liquid Chalcogens at High Temperature and Pressure
• Quasielastic and Inelastic Neutron Scatterings of Liquid Tellurium
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• Non-Metal to Metal Transition in Amorphous Ge and Ge-Sn Alloys under High Pressure
• Mossbauer Studies on the Tellurium-Selenium Mixed Chains
• Electrical Properties of Liquid Te-Se Mixtures at High Temperatures and High Pressures
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• Pressure Effect on the Two-Phase Region in the Liquid Tl-Se Mixtures
• On the Miscibility Gap in Liquid Tl-Te Alloy
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• Neutron Diffraction Studies on the Liquid Te and As-Te Mixtures (Condensed Matter : Structure, Mechanical and Thermal Properties)
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• Electrical Conductivity of Liquid In_2Te_3,Tl_2Te,Tl_2Se and Ag_2Te at High Temperatures and Pressures
• Electrical Conductivity of Liquid Te and Its Dilute Alloys Containing Co, Cr, Au and Ag at High Temperatures and Pressures
• Electrical Conductivity and Thermoelectric Power of Expanded Mercury and Dilute Amalgams.II.Dilute Au, Tl and Bi Amalgams
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• Electronic Properties of Liquid Selenium Containing Alkali and Halogen Impurities
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• Electronic and Atomic Structures of Liquid Tellurium Containing Alkali Elements
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