Abstract
In general a solid-solid phase boundary does not terminate in a critical point due to symmetry requirements. However, there exists systems like pure cerium metal and rare earth compounds like samarium sulphide where an isostructural solid-solid phase boundary terminates at a critical point. The critical point for the pressure-induced semiconductor-metal phase transition in SmS has been determined for the first time using the thermoelectric power data collected upto 12 kbar pressure and 850° C. These results are discussed on the basis of some theoretical models developed for the mixed valent compounds.
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Shubha, V. Critical phenomena in solids. Bull. Mater. Sci. 1, 213–222 (1979). https://doi.org/10.1007/BF02743970
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DOI: https://doi.org/10.1007/BF02743970