Transport properties of topological nodal-line semimetal candidate CaAs3 under hydrostatic pressure
CHINESE PHYSICS B(2019)
摘要
We report the transport properties of the CaAs3 single crystal, which has been predicted to be a candidate for topological nodal-line semimetals. At ambient pressure, CaAs3 exhibits semiconducting behavior with a small gap, while in some crystals containing tiny defects or impurities, a large "hump" in the resistivity is observed around 230 K. By applying hydrostatic pressure, the samples appear to a tendency towards metallic behavior, but not fully metallized up to 2 GPa. Further high pressure studies are needed to explore the topological characteristics for CaAs3.
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关键词
hydrostatic pressure,topological material,crystal growth
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