2023年6月20日 · In this study, we demonstrate that chalcogen-rich 2D TM-chalcogenides, such as 2D tetra-chalcogenides (TMT) or MX 4, can exhibit moderate phase-change temperatures ( Tc and Tm) as a consequence of the reduction in transition metal content compared with TMDs (MX 2) that are suitable for PCRAM based on phase-change between amorphous and crystallin...

2023年7月1日 · Inspired by the recent studies on transition-metal dichalcogenides, we systematically investigate the CDW order and superconductivity in the well known CDW material NbTe4. The structure of NbTe4 is quasi-1D like belonging to space group P4/mcc as shown in Fig. 1 where the metal atoms form a quasi-linear chains along the tetragonal c-axis [37] .

2018年4月19日 · In this paper, we report large magneto-resistance and high pressure induced superconductivity in NbTe 4. The CDW transition temperature is strongly suppressed by applied pressure, and...

Single-crystalline NbTe 4 microcone, microplate, and nanorod arrays were grown on Nb substrates by a surface-assisted chemical-vapor-transport under different conditions. The microcones are composed of small and large cones with a bending top.

2019年3月15日 · It is shown that Te deficient samples exhibit Te atoms occupying interstitial positions of the original crystal structure of NbTe4. This defective structure causes a large enhancement of the electrical resistivity anomaly related with a CDW ordering around 200 K.

2023年7月30日 · Two-dimensional (2D) van der Waals (vdW) transition metal di-chalcogenides (TMDs) have garnered significant attention in the nonvolatile memory (NVM) field for their tunable electrical properties,...

2023年1月17日 · 在本文中，我们结合了声子结构计算和扫描隧道显微镜测量 铌碲 4个 为了提供 CDW 状态的完整特征。 我们发现，在短距离内，CDW 形成的超结构与晶格参数完全相称。 此外，我们的数据揭示了相滑畴壁的存在，在纳米尺度上分隔了相应的 CDW 区域，表明该化合物中的 CDW 在长距离范围内是不相称的。 我们的结果解决了关于这些材料中 CDW 性质的长期讨论，并为研究这种状态与其他新型量子电子状态之间的相互作用提供了坚实的基础。 过渡金属四硫 …

This study focuses on the low-T m 2D vdW TM tetra-chalcogenides and identifies NbTe 4 as a promising candidate with an ultra-low T m of around 447 °C (onset temperature). As-grown NbTe 4 forms an amorphous phase upon deposition that can be crystallized by annealing at temperatures above 272 °C.

As-grown NbTe4 forms an amorphous phase upon deposition that can be crystallized by annealing at temperatures above 272 °C.

2024年8月28日 · Here we report pressure induced superconductivity in a strong spin-orbit (SO) coupled quasi-one-dimensional (1D) transition-metal chalcogenide NbTe4, which is a CDW material under ambient...