论文标题
厚度依赖性电荷密度波网络薄1T-TAS $ _2 $
Thickness dependent charge density wave networks on thin 1T-TaS$_2$
论文作者
论文摘要
我们在室温下使用扫描隧道显微镜进行机械剥落的薄1T-TAS $ _2 $。没有空气暴露的样品制备使薄1T-TAS $ _2 $的固有电荷密度波（CDW）阶段访问。在室温下，我们可以在薄片上观察到预期的几乎相应的CDW（NCCDW）阶段，类似于大量1T-TAS $ _2 $。进一步的分析表明，NCCDW相中的CDW结构域变小，并且具有更高的各向异性形状，厚度降低了8-28层。我们的发现表明，薄1T-TAS $ _2 $的各向异性CDW性质对于了解其异国情调的CDW相关现象至关重要，并要求对其对厚度驱动的CDW域各向异性和薄1T-TAS中的中间CDW状态之间的相关性进行系统的研究。
We investigate mechanically exfoliated thin 1T-TaS$_2$ with scanning tunneling microscopy at room temperature. Sample preparation without air exposure enables access to intrinsic charge-density-wave (CDW) phases of thin 1T-TaS$_2$. At room temperature, we can observe the expected nearly commensurate CDW (NCCDW) phase on thin flakes similar to bulk 1T-TaS$_2$. Further analysis reveals that the CDW domains in the NCCDW phase become smaller and have more anisotropic shape with decreasing thickness in the range of 8-28 layers. Our findings demonstrate that the anisotropic CDW nature of thin 1T-TaS$_2$ would be crucial to understand its exotic CDW-related phenomena and demand a systematic study on its correlation between the thickness-driven CDW domain anisotropy and the intermediate CDW states in thin 1T-TaS$_2$.
