Three-dimensional topological semimetal phase in layered <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>TaNi</mml:mi><mml:msub><mml:mi>Te</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math> probed by quantum oscillations
Zheng Chen, Min Wu, Yong Zhang, Jinglei Zhang, Yong Nie, Yongliang Qin, Yuyan Han, Chuanying Xi, Shuaiqi Ma, Xucai Kan, Jianhui Zhou, Xiaoping Yang, Xiangde Zhu, Wei Ning, Mingliang Tian
Abstract
Recently layered compound $\mathrm{TaNi}{\mathrm{Te}}_{5}$ was proposed to be two-dimensional (2D) topological semimetals. Here we report the detailed investigation on $\mathrm{TaNi}{\mathrm{Te}}_{5}$ single crystals through magnetotransport and de Hass\ensuremath{-}van Alphen (dHvA) effect studies. Strong quantum oscillations with multiple periodicities have been observed. By analyzing the quantum oscillations, we provide evidence of nontrivial Berry phase with a 3D Fermi surface character in layered $\mathrm{TaNi}{\mathrm{Te}}_{5}$. Our work suggested that layered $\mathrm{TaNi}{\mathrm{Te}}_{5}$ should be 3D topological semimetal which offers a platform to explore exotic properties in low-dimensional topological semimetals.