2015年2月17日 · In our investigations, we employ a combination of experimental probes. Scanning tunnelling microscopy (STM) and X-ray diffraction (XRD) are used to measure the real and momentum space structure...

2021年12月16日 · By using scanning tunnelling microscopy (STM), we demonstrate that at small twist angles, the moiré pattern traps the CDW domain in the 1T-TiTe 2 monolayer and substantially enhances its...

2022年1月14日 · We present a scanning tunneling microscopy (STM) and ab-initio study of the anisotropic superconductivity of 2H-NbSe 2 in the charge-density-wave (CDW) phase.

2020年12月31日 · Two long-standing riddles are the amplitude and position of the CDW gap with respect to the Fermi level () and the frequent absence of CDW contrast inversion (CI) between opposite bias scanning tunneling microscopy (STM) images. Here, we find compelling evidence that these two issues are intimately related.

2021年7月7日 · The nearly commensurate charge density wave (CDW) excitations native to the transition-metal dichalcogenide crystal, 1T-TaS 2, under ambient conditions are revealed by scanning tunneling microscopy (STM) and spectroscopy (STS) measurements of a graphene/TaS 2 heterostructure.

电荷密度波 (charge density wave, CDW)是低维体系中存在的一种重要的物理现象, 对CDW的研究有助于人们对低维系统中内禀电声子耦合和关联等相互作用有更深层次的认识, 同时通过对材料中CDW的精准调控可以有效控制低维材料中磁性、超导等物理性质.

2013年7月8日 · We report the direct observation in real space of the charge density wave (CDW) phase transition in pristine 2H-NbSe2 using atomic-resolution scanning tunneling microscopy (STM). We find that static CDW order is established in nanoscale regions in the vicinity of defects at temperatures that are several times the bulk transition temperature Tcdw.

4 天之前 · STM imaging of CDW at negative bias voltage We performed STM imaging of cleaved single crystals of Ce (Sb 1–x Te x)Te 1–δ at a temperature of 4.2 K and a magnetic field of 0 T, which lie in ...

2010年10月18日 · We discovered the chirality of charge-density waves (CDW) in by using STM and time-domain optical polarimetry. We found that the CDW intensity becomes , where () is the amplitude of the tunneling current contributed by the CDWs. There were two states, in which the three intensity peaks of the CDW decrease clockwise and anticlockwise.

Here, we investigate the CDW in monolayer NbS 2 using scanning tunneling microscopy (STM) and spectroscopy (STS) as well as theoretical ab initio based modeling. Within a clear gap in the STS measured d I /d V spectra, a persistent and position-dependent fine structure is observed.