| Superconductivity in Topological Semimetal θ-TaN at High Pressure |
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| 引用本文： | 贾雅婷,赵建发,张思佳,于爽,代光阳,李文敏,段磊,赵国强,望贤成,郑旭,刘清青,龙有文,李志,李晓东,翁红明,于润泽,禹日成,靳常青.Superconductivity in Topological Semimetal θ-TaN at High Pressure[J].中国物理快报,2019(8). |
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| 作者姓名： | 贾雅婷 赵建发 张思佳 于爽 代光阳 李文敏 段磊 赵国强 望贤成 郑旭 刘清青 龙有文 李志 李晓东 翁红明 于润泽 禹日成 靳常青 |
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| 摘 要： | Recently,θ-TaN was proposed to be a topological semimetal with a new type of triply degenerate nodal points.Here,we report studies of pressure dependence of transport,Raman spectroscopy and synchrotron x-ray diffraction on θ-TaN up to 61 GPa.We find that θ-TaN becomes superconductive above 24.6 GPa with T_c at 3.1 K.The θ-TaN is of n-type carrier nature with carrier density about 1.1 × 10~(20)/cm~3 at 1.2 GPa and 20 K, while the carrier density increases with the pressure and saturates at about 40 GPa in the measured range.However,there is no crystal structure transition with pressure up to 39 GPa,suggesting the topological nature of the pressure induced superconductivity.
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