Insulator-to-superconductor transition in quasi-one-dimensional HfS3 under pressure

Abstract

Various transition metal trichalcogenides (TMTC) show the charge-density-wave and superconductivity, which provide an ideal platform to study the correlation between these two orderings and the mechanism of superconductivity. Currently, almost all metallic TMTC compounds can show superconductivity either at ambient pressure or at high pressure. However, most TMTC compounds are semiconductors and even insulators. Does the superconductivity exist in any non-metal TMTC compound? In this work, we managed to manipulate the electronic behavior of highly insulating HfS3 in term of pressure. HfS3 underwent an insulator-semiconductor transition near 17 GPa with a band gap reduce of ~1 eV. The optical absorption and Raman measurement provide the consistent results, suggesting the structural origin of the electronic transition. Upon further compression, HfS3 becomes a superconductor. The superconducting transition was initialized as early as 50.6 GPa and the zero-resistance is reached above 91.2 GPa. The superconducting behavior is further confirmed by both the magnetic field effect and current effect. This work sheds the light that all TMTC may be superconductors, and opens a new avenue to explore the abundant emergence phenomena in TMTC material family.

References in corpus (10)

• Superconducting density of states and vortex cores of 2H-NbS2
• Electronics and optoelectronics of quasi-one dimensional layered transition metal trichalcogenides
• NbS${}_3$: A unique quasi one-dimensional conductor with three charge density wave transitions
• Topological phases in the TaSe3 compound
• Structural contributions to the pressure-tuned charge-density-wave to superconductor transition in ZrTe3: Raman scattering studies
• The Basic and the Charge Density Wave Modulated Structures of NbS3-II
• Quantum critical point and superconducting dome in the pressure phase diagram of o-TaS3
• Thermal dynamics of charge density wave pinning in ZrTe3
• Suppression of axionic charge density wave and onset of superconductivity in the chiral Weyl semimetal Ta${}_2$Se${}_8$I
• Raman Fingerprint of Pressure-Induced Phase Transitions in TiS3 Nanoribbons: Implications for Thermal Measurements under Extreme Stress Conditions