Pressure‐Induced Superconductivity and Topological Quantum Phase Transitions in the Topological Semimetal ZrTe<sub>2</sub>
Shihao Zhu, Juefei Wu, Peng Zhu, Cuiying Pei, Qi Wang, Donghan Jia, Xinyu Wang, Yi Zhao, Lingling Gao, Changhua Li, Weizheng Cao, Mingxin Zhang, Lili Zhang, Mingtao Li, Huiyang Gou, Wenge Yang, Jian Sun, Yulin Chen, Zhiwei Wang, Yugui Yao, Yanpeng Qi
Abstract
Abstract Topological transition metal dichalcogenides (TMDCs) have attracted much attention due to their potential applications in spintronics and quantum computations. In this work, the structural and electronic properties of topological TMDCs candidate ZrTe 2 are systematically investigated under high pressure. A pressure‐induced Lifshitz transition is evidenced by the change of charge carrier type as well as the Fermi surface. Superconductivity is observed at around 8.3 GPa without structural phase transition. A typical dome‐shape phase diagram is obtained with the maximum T c of 5.6 K for ZrTe 2 . Furthermore, the theoretical calculations suggest the presence of multiple pressure‐induced topological quantum phase transitions, which coexists with emergence of superconductivity. The results demonstrate that ZrTe 2 with nontrivial topology of electronic states displays new ground states upon compression.