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Pressure-Induced Superconductivity and Topological Quantum Phase Transitions in the Topological Semimetal ZrTe2.

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 ZrTe2 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 Tc of 5.6 K for ZrTe2 . 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 ZrTe2 with nontrivial topology of electronic states displays new ground states upon compression.

SUBMITTER: Zhu S 

PROVIDER: S-EPMC10724415 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature

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Pressure-Induced Superconductivity and Topological Quantum Phase Transitions in the Topological Semimetal ZrTe<sub>2</sub>.

Zhu Shihao S   Wu Juefei J   Zhu Peng P   Pei Cuiying C   Wang Qi Q   Jia Donghan D   Wang Xinyu X   Zhao Yi Y   Gao Lingling L   Li Changhua C   Cao Weizheng W   Zhang Mingxin M   Zhang Lili L   Li Mingtao M   Gou Huiyang H   Yang Wenge W   Sun Jian J   Chen Yulin Y   Wang Zhiwei Z   Yao Yugui Y   Qi Yanpeng Y  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20231109 35

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<sub>2</sub> 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 structura  ...[more]

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