Experimental study of liquid carbon

Direct measurements of the functional dependencies of the electric resistivity and the molar volume on enthalpy and pressure have been performed for graphite and liquid carbon. It has been found that for graphite at the pressures P     1 GPa the isochoric temperature coefficient of resistance is pos...

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Published inJournal of physics. Condensed matter Vol. 28; no. 26; p. 265501
Main Authors Kondratyev, A M, Korobenko, V N, Rakhel, A D
Format Journal Article
LanguageEnglish
Published England IOP Publishing 06.07.2016
Subjects
Gruneisen coefficient
liquid carbon
metal-nonmetal transition
resistivity
temperature coefficient of resistance
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Summary:Direct measurements of the functional dependencies of the electric resistivity and the molar volume on enthalpy and pressure have been performed for graphite and liquid carbon. It has been found that for graphite at the pressures P     1 GPa the isochoric temperature coefficient of resistance is positive, while for liquid carbon it is negative over the entire pressure range investigated where P  =  0.5-3.5 GPa. These observations probably indicate that graphite is a metal whereas liquid carbon is not a metal, so that the melting of graphite under such pressures coincides with a metal-to-nonmetal transition.
Bibliography:JPCM-106526.R2
ObjectType-Article-1
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ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/28/26/265501