1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871 2Collaborative Innovation Center of Quantum Matter, Beijing 100871 3Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190 4Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871 5School of Physics, Huazhong University of Science and Technology, Wuhan 430074 6Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 7Department of Materials Science and Engineering, School of New Energy and Materials, China University of Petroleum, Beijing 102249 8Beijing Academy of Quantum Information Sciences, Beijing 100193 9University of Chinese Academy of Sciences, Beijing 100190 10Songshan Lake Materials Laboratory, Dongguan 523808 11CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190
Abstract：Transition metal dichalcogenides, featuring layered structures, have aroused enormous interest as a platform for novel physical phenomena and a wide range of potential applications. Among them, special interest has been placed upon WTe$_{2}$ and MoTe$_{2}$, which exhibit non-trivial topology both in single layer and bulk as well as pressure induced or enhanced superconductivity. We study another distorted 1T material NbTe$_{2}$ through systematic electrical transport measurements. Intrinsic superconductivity with onset transition temperature ($T_{\rm c}^{\rm onset}$) up to 0.72 K is detected where the upper critical field ($H_{\rm c}$) shows unconventional quasi-linear behavior, indicating spin-orbit coupling induced p-wave paring. Furthermore, a general model is proposed to fit the angle-dependent magnetoresistance, which reveals the Fermi surface anisotropy of NbTe$_{2}$. Finally, non-saturating linear magnetoresistance up to 50 T is observed and attributed to the quantum limit transport.
Wu S, Fatemi V, Gibson Q D, Watanabe K, Taniguchi T, Cava R J and Jarillo-Herrero P 2018 Science359 76
[9]
Li Y, Gu Q, Chen C, Zhang J, Liu Q, Hu X, Liu J, Liu Y, Ling L, Tian M, Wang Y, Samarth N, Li S, Zhang T, Feng J and Wang J 2018 Proc. Natl. Acad. Sci. USA115 9503
[10]
Qi Y P, Naumov P G, Ali M N, Rajamathi C R, Schnelle W, Barkalov O, Hanfl, M, Wu S C, Shekhar C, Sun Y, Suss V, Schmidt M, Schwarz U, Pipel E, Werner P, Hillebr, R, Forster T, Kampert E, Parkin S, Cava R J, Felser C, Yan B H and Medvedev S A 2016 Nat. Commun.7 11038
Kang D F, Zhou Y Z, Yi W, Yang C L, Guo J, Shi Y G, Zhang S, Wang Z, Zhang C, Jiang S, Li A G, Yang K, Wu Q, Zhang G M, Sun L L and Zhao Z X 2015 Nat. Commun.6 7804
[18]
Pan X C, Chen X L, Liu H M, Feng Y Q, Wei Z X, Zhou Y H, Chi Z H, Pi L, Yen F, Song F Q, Wan X G, Yang Z R, Wang B G, Wang G H and Zhang Y H 2015 Nat. Commun.6 7805
Xing Y, Wang H, Li C K, Zhang X, Liu J, Zhang Y W, Luo J W, Wang Z Q, Ling L S, Tian M L, Jia S, Feng J, Liu X J, Wei J and Wang J 2016 npj Quantum Mater.1 16005
