Direct Optical Observation of the Semiconductor-to-Metal Transition in SmS under Pressure
- 15 October 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 6 (8), 3023-3026
- https://doi.org/10.1103/physrevb.6.3023
Abstract
A discontinuous change in the reflectivity due to the first-order semiconductor-to-metal transition has been observed in SmS at a pressure of about 6 kbar. The metallic state is characterized by a golden yellow luster which arises because of interband transitions superimposed on the Drude reflectivity. These results and the pressure dependence of the optical-absorption edge in semiconducting SmSe and SmTe are in excellent agreement with earlier resistivity measurements.Keywords
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