  Topological transition metal dichalcogenides (TMDCs) have attracted much
attention due to its potential applications in spintronics and quantum
computations. In this work, we systematically investigate the structural and
electronic properties of topological TMDCs candidate ZrTe2 under high pressure.
A pressure-induced Lifshitz transition is evidenced by the change of charge
carrier type as well as the Fermi surface. Superconductivity was 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, our
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 display new ground states upon compression.
