2020年8月24日 · 1 T -TaS 2 undergoes successive phase transitions upon cooling and eventually enters an insulating state of mysterious origin. Some consider this state to be a band insulator with interlayer...

2025年2月25日 · We report an experimental ultrafast generation and detection of the coherent amplitude mode (AM) of its CDW state. A salient feature emerges: The coherent CDW mode AM exhibits an unusual T3.56 temperature dependence below 65 K, in addition to the T2 temperature dependence observed in the 65 to 200 K range.

2024年4月23日 · In this study, we present a unique approach to unlock the intertwined two-dimensional Mott-insulator and three-dimensional band-insulator states in bulk 1T-TaS 2 crystals by structuring a...

2024年6月26日 · By incorporating chiral molecules into conventional superconductor lattices such as TaS2 to form a hybrid superlattice, non-centrosymmetry could be introduced and can be shown to help lead to ...

2024年12月17日 · Tantalum disulfide (1T-TaS 2), being a Mott insulator with strong electron correlation, is highlighted for diverse collective quantum states in the 2D lattice, including charge density wave (CDW), spin liquid, and unconventional superconductivity.

2020年8月28日 · 过渡金属二硫组化合物是一大类被广泛研究的层状二维材料，其不仅在工业上有广阔的的应用前景，同时也蕴含丰富的凝聚态物理现象。 1T-TaS 2 是一个经典的例子。 高温时，1T-TaS 2 处于金属态；随着降温，1T-TaS 2 经历多个电荷密度波（CDW）相变，并最终在低温下进入绝缘态。 有关1T-TaS 2 绝缘态的成因一直存在争议。...

1月26日，相关研究论文Gate-tunable phase transitions in thin flakes of 1T-TaS2（二硫化钽薄层中的可控相变）发表于Nature子刊Nature Nanotechnology（《自然•纳米技术》）。 论文第一和第二作者分别为复旦大学物理系2012级博士生於逸骏和2011级博士生杨昉原。

2024年12月14日 · Here, we present a Wannier tight-binding model study of TaS 2 in a periodically modulated electric potential and investigate the relation to details of the band structure. Our results show that such a superlattice potential not only generates flat bands at low energies but also induces band interactions and significantly alters energy dispersion.

TaS2 is trigonal omega-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of six TaS2 sheets oriented in the (0, 0, 1) direction. Ta4+ is bonded to six equivalent S2- atoms to form edge-sharing TaS6 octahedra. All Ta–S bond lengths are 2.48 Å.

2024年12月18日 · Tantalum disulfide (1T‐TaS2), being a Mott insulator with strong electron correlation, is highlighted for diverse collective quantum states in the 2D lattice, including charge density wave (CDW), spin liquid, and unconventional superconductivity.