Discovery of Dome‐Shaped Superconducting Phase and Anisotropic Transport in a van der Waals Layered Candidate NbIrTe 4 under Pressure

作者：Meiling Jin, Peng Yu, Changzeng Fan, Qiang Li, Panlong Kong, Zhiwei Shen, Xiaomei Qin, Zhenhua Chi, Changqing Jin, Guangtong Liu, Guyue Zhong, Gang Xu, Zheng Liu, Jinlong Zhu · 发表于：Advanced Science · 年份：2021 · DOI：10.1002/advs.202103250 · 被引用次数：8 · 研究领域：Iron-based superconductors research、2D Materials and Applications、Advanced Thermoelectric Materials and Devices

Abstract The unique electronic structure and crystal structure driven by external pressure in transition metal tellurides (TMTs) can host unconventional quantum states. Here, the discovery of pressure‐induced phase transition at ≈2 GPa, and dome‐shaped superconducting phase emerged in van der Waals layered NbIrTe 4 is reported. The highest critical temperature ( T c ) is ≈5.8 K at pressure of ≈16 GPa, where the interlayered Te–Te covalent bonds form simultaneously derived from the synchrotron diffraction data, indicating the hosting structure of superconducting evolved from low‐pressure two‐dimensional (2D) phase to three‐dimensional (3D) structure with pressure higher than 30 GPa. Strikingly, the authors have found an anisotropic transport in the vicinity of the superconducting state, suggesting the emergence of a “stripe”‐like phase. The dome‐shaped superconducting phase and anisotropic transport are possibly due to the spatial modulation of interlayer Josephson coupling .