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Transition-metal chalcogenides host various phases of matter, such ascharge-density wave (CDW), superconductors, and topological insulators orsemimetals. Superconductivity and its competition with CDW in low-dimensionalcompounds have attracted much interest and stimulated considerable research.Here we report pressure induced superconductivity in a strong spin-orbit (SO)coupled quasi-one-dimensional (1D) transition-metal chalcogenide NbTe$_4$,which is a CDW material under ambient pressure. With increasing pressure, theCDW transition temperature is gradually suppressed, and superconductingtransition, which is fingerprinted by a steep resistivity drop, emerges atpressures above 12.4 GPa. Under pressure $p$ = 69 GPa, zero resistance isdetected with a transition temperature $T_c$ = 2.2 K and an upper criticalfield $H_{c2}$= 2 T. We also find large magnetoresistance (MR) up to 102\% atlow temperatures, which is a distinct feature differentiating NbTe$_4$ fromother conventional CDW materials.

Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spinorbit coupling