有鉴于此,近日,北京理工大学刘立巍副教授等利用扫描隧道显微镜/光谱学研究单层1T-NbSe2来阐明莫特上层哈伯德能带(UHB)的能量,并揭示出自旋极化的UHB在空间上的分布远离CDW单元中心的dz2轨道。此外,除了通常观察到的CDW图案外,UHB还显示出√3×√3R30°周期性。此外,在莫特间隙深处可以看到类似于CDW有序的图案,显示...
Understanding Mott insulators and charge density waves (CDW) is critical for both fundamental physics and future device applications. However, the relationship between these two phenomena remains unclear, particularly in systems close to two-dimensional
CDW transition temperatures with changes in the number of layers, thus providing a valuable opportunity for studying key questions regarding the interplay among dimensionality, the CDW and superconductivity.11–14 In contrast to the intensively studied 2H-NbSe2,15,16 the 1T counterpart has not yet ...
The temperature dependence of the normalized CDW amplitude (order parameter of the phase transition) is obtained from the width of the Knight shift distributions below T0. For 2H-NbSe2 the type of phasing of the locally commensurate CDW state is determined from the combined analysis of the 77...
Optical phonons and the soft mode in 2H-NbSe2 We present an investigation of the lattice dynamics of the charge density wave (CDW) compound 2H-NbSe2. We analyze the precise nature of the wav... F.,Weber,R.,... - 《Physical Review B》 被引量: 21发表: 2013年 ...