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Synthesis and Characterization of a Trigonal Layered Compound AgInS2
Takahiro Sawahara1, Ryo Matsumoto2, Yuki Nakahira3
1Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
Abstract:
Depending on thermal and pressure conditions, AgInS2 exhibits various crystal structures. In this study, we synthesized a high-purity polycrystalline sample of trigonal AgInS2, which is a layered compound, using a high-pressure synthesis technique. The crystal structure was investigated by synchrotron powder X-ray diffraction and the Rietveld refinement. On the basis of band calculation, X-ray photoelectron spectroscopy, and electrical resistance measurements, we found that the obtained trigonal AgInS2 is a semiconductor. Temperature dependencies of electrical resistance of AgInS2 were measured by a diamond anvil cell up to 31.2 GPa. Although semiconducting behavior was suppressed with pressure, metallic behavior was not observed within the pressure range investigated in this study.
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