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Journal of Physical Studies 5(2), 145–149 (2001)
DOI: https://doi.org/10.30970/jps.05.145
METAL-NONMETAL TRANSITION IN LIQUID
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Both electrical conductivity and thermo-e.m.f. measurements were performed for the ternary Cu-based liquid chalcogenides in a wide temperature range (up to 1800 K) under the ambient pressures of argon gas (up to 25 MPa). Basing on the obtained results, the concentration and temperature semiconductor-to-metal transitions were investigated. A complete metallization of alloys takes place with the temperature and concentration increasing. A further heating is accompanied by an exponential electrical conductivity decreasing, while thermopower increases without changing a sign. This process is accompanied by an increase of free electrons concentration as well as by the localization of the wave functions of electrons on separate atoms or atoms groups.
PACS number(s): 64.70.-p, 71.22.+i