Transport properties of topological nodal-line semimetal candidate CaAs3 under hydrostatic pressure Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0401000 and 2016YFA0300604), the National Key Basic Research Program of China (Grant No. 2015CB921303), the Strategic Priority Research Program (B) of Chinese Academy of Sciences (Grant No. XDB07020100), and the National Natural Science Foundation of China (Grant No. 11874417)

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 "...

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Published inChinese physics B Vol. 28; no. 4
Main Authors Li, Jing, Zhao, Ling-Xiao, Wang, Yi-Yan, Wang, Xin-Min, Ma, Chao-Yang, Zhu, Wen-Liang, Gao, Mo-Ran, Zhang, Shuai, Ren, Zhi-An, Chen, Gen-Fu
Format Journal Article
LanguageEnglish
Published Chinese Physical Society and IOP Publishing Ltd 01.04.2019
Subjects
crystal growth
hydrostatic pressure
topological material
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Summary: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.
ISSN:1674-1056
DOI:10.1088/1674-1056/28/4/046202