Abstract
We report on an intricate competition between charge density wave (CDW) formation and superconductivity under pressure up to 11 GPa in the low-dimensional conductor ${\mathrm{ZrTe}}_{3}$. As pressure increases, the CDW transition temperature ${T}_{\mathrm{CDW}}$ initially increases, then begins to decrease at 2 GPa and abruptly disappears near 5 GPa. On the other hand, while the superconducting transition temperature ${T}_{\mathrm{C}}$ falls to below 1.2 K at $\ensuremath{\sim}0.5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ and is not observed at up to 5 GPa above 2.5 K, a superconducting transition emerges beginning at $\ensuremath{\sim}5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ and ${T}_{\mathrm{C}}$ increases steeply up to 11 GPa. This is an observation of pressure-induced reentrant superconductivity. The results are discussed in terms of the change in the reduced area of the Fermi surface due to CDW formation.
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