Superconductivity in Topological Semimetal \theta-TaN at High Pressure
-
Ya-Ting Jia,
-
Jian-Fa Zhao,
-
Si-Jia Zhang,
-
Shuang Yu,
-
Guang-Yang Dai,
-
Wen-Min Li,
-
Lei Duan,
-
Guo-Qiang Zhao,
-
Xian-Cheng Wang,
-
Xu Zheng,
-
Qing-Qing Liu,
-
You-Wen Long,
-
Zhi Li,
-
Xiao-Dong Li,
-
Hong-Ming Weng,
-
Run-Ze Yu,
-
Ri-Cheng Yu,
-
Chang-Qing Jin
-
Abstract
Recently, \theta-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 \theta-TaN up to 61 GPa. We find that \theta-TaN becomes superconductive above 24.6 GPa with T_\rm c at 3.1 K. The \theta-TaN is of n-type carrier nature with carrier density about 1.1\times 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.
Article Text
-
-
-
About This Article
Cite this article:
Ya-Ting Jia, Jian-Fa Zhao, Si-Jia Zhang, Shuang Yu, Guang-Yang Dai, Wen-Min Li, Lei Duan, Guo-Qiang Zhao, Xian-Cheng Wang, Xu Zheng, Qing-Qing Liu, You-Wen Long, Zhi Li, Xiao-Dong Li, Hong-Ming Weng, Run-Ze Yu, Ri-Cheng Yu, Chang-Qing Jin. Superconductivity in Topological Semimetal $\theta$-TaN at High Pressure[J].
Chin. Phys. Lett., 2019, 36(8): 087401.
DOI: 10.1088/0256-307X/36/8/087401
Ya-Ting Jia, Jian-Fa Zhao, Si-Jia Zhang, Shuang Yu, Guang-Yang Dai, Wen-Min Li, Lei Duan, Guo-Qiang Zhao, Xian-Cheng Wang, Xu Zheng, Qing-Qing Liu, You-Wen Long, Zhi Li, Xiao-Dong Li, Hong-Ming Weng, Run-Ze Yu, Ri-Cheng Yu, Chang-Qing Jin. Superconductivity in Topological Semimetal $\theta$-TaN at High Pressure[J]. Chin. Phys. Lett., 2019, 36(8): 087401. DOI: 10.1088/0256-307X/36/8/087401
|
Ya-Ting Jia, Jian-Fa Zhao, Si-Jia Zhang, Shuang Yu, Guang-Yang Dai, Wen-Min Li, Lei Duan, Guo-Qiang Zhao, Xian-Cheng Wang, Xu Zheng, Qing-Qing Liu, You-Wen Long, Zhi Li, Xiao-Dong Li, Hong-Ming Weng, Run-Ze Yu, Ri-Cheng Yu, Chang-Qing Jin. Superconductivity in Topological Semimetal $\theta$-TaN at High Pressure[J]. Chin. Phys. Lett., 2019, 36(8): 087401. DOI: 10.1088/0256-307X/36/8/087401
Ya-Ting Jia, Jian-Fa Zhao, Si-Jia Zhang, Shuang Yu, Guang-Yang Dai, Wen-Min Li, Lei Duan, Guo-Qiang Zhao, Xian-Cheng Wang, Xu Zheng, Qing-Qing Liu, You-Wen Long, Zhi Li, Xiao-Dong Li, Hong-Ming Weng, Run-Ze Yu, Ri-Cheng Yu, Chang-Qing Jin. Superconductivity in Topological Semimetal $\theta$-TaN at High Pressure[J]. Chin. Phys. Lett., 2019, 36(8): 087401. DOI: 10.1088/0256-307X/36/8/087401
|