研究团队通过分子束外延成功制备并测量了1T结构的单层过渡金属二硫属化物1T-NbSe2、TaSe2和TaS2。角分辨光电子能谱(ARPES)发现这些材料在费米面附近出现平带,并且打开约 200 meV 的能隙(Δ),表明其绝缘性质。变温实验发现 NbSe2的相变...
A high-efficiency programmable modulator for extreme ultraviolet light with nanometre feature size based on an electronic phase transition. 基于电子相变,纳米特征尺寸极紫外光高效可编程调制器。 图1: 1T-TaS2实验方案和特性。 图2: 在室温时,测量极紫外e...
The heat capacity of 1T-TaS 2 has been measured over the temperature range including the successive phase transitions (140 K–370 K) by an adiabatic calorimeter. There are three transitions in the measured temperature range, two first-order transitions (at about 226 K ( T 1) and about ...
近日,上海交通大学物理与天文学院陈鹏课题组揭示了单层1T相过渡金属硫族化合物(NbSe₂、TaSe₂和TaS₂)中莫特绝缘态的稳定性可通过改变金属原子的d轨道和硫族原子p轨道的杂化强度来有效控制,为探索强关联电子问题提供了新的平台。该研究成果以“Orbital textures and evolution of correlated insulating state in ...
近日,上海交通大学物理与天文学院陈鹏课题组揭示了单层1T相过渡金属硫族化合物(NbSe₂、TaSe₂和TaS₂)中莫特绝缘态的稳定性可通过改变金属原子的d轨道和硫族原子p轨道的杂化强度来有效控制,为探索强关联电子问题提供了新的平台。该研究成果以“Orbital textures and evolution of correlated insulating state in ...
We find that the charge-density-wave states in 1T-TaS _2 _2 are three-dimensional in nature, and completely collapse in the two-dimensional limit defined by their critical thicknesses. Meanwhile the ionic gating induces multiple phase transitions from Mott-insulator to metal in 1T-TaS _2 _2...
1T-TaS2 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 stacking order, yet others attribute it to Mott physics that suppo
phase transitionsDebye-like behaviorCDWpolymorphic transitionsTaS 2/ A6470K Solid-solid transitions A7145 Collective effects (condensed matter electronic structure)/ TaS2/bin S2 /bin Ta/bin S/binThe integrated intensities of three Bragg reflections have been measured on an absolute basis between 5.0 ...
Here we report experimental evidence of reversible cavity control of a metal-to-insulator phase transition in a correlated solid-state material. We embed the charge density wave material 1T-TaS2 into cryogenic tunable terahertz cavities3 and show that a switch between conductive and insulating ...
The 1T phase TaS2 crystals produced at HQ Graphene have a typical lateral size of ~0.6-0.8 cm, are hexagonal shaped and have a metallic appearance.二硫化钽晶体(1T) TaS2(Tantalum Sulfide) -1T晶体尺寸 8毫米电学性能:半导体,电荷密度波(CDW),Mott相晶体...