2023年12月11日 · Here, we operate a 2-terminal TaS 2 device within a scanning transmission electron microscope (STEM) at cryogenic temperature. Through time-resolved electron diffraction and 4D-STEM imaging,...

2016年9月28日 · Layered transition-metal dichalcogenides (TMDs), such as TaS 2 or TaSe 2, are prototypical charge-density-wave (CDW) systems that spontaneously break lattice symmetry through periodic lattice distortions (PLDs). PLDs are associated with dramatic electronic changes such as metal-to-insulator transitions (1).

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-TaS2 crystals by structuring a...

2021年7月22日 · The TaS2-based photoelectrocatalyst demonstrates high hydrogen evolution reaction (HER) activity with the onset overpotential below 575 mV vs. reversible hydrogen electrode (RHE).

In a further magnifying STEM image (Figure 3 f), the 1T phase structure of the obtained TaS 2 is well presented with an overlaying of the atomic model.

2015年11月23日 · In this work, we use transmission electron microscopy (TEM) together with transport measurements to develop a systematic understanding of the CDW phases and phase transitions in ultrathin 1T-TaS 2. We find that charge ordering disappears in flakes with few atomic layers due to surface oxidation.

2023年9月12日 · Here, we operate a 2-terminal TaS 2 device within a scanning transmission electron microscope (STEM) at cryogenic temperature, and directly visualize the changing CDW structure with nanoscale spatial resolution and down to 300 {\mu}s temporal resolution.

1T-TaS 2 is unique among transition metal dichalcogenides in that it is understood to be a correlation-driven insulator, where the unpaired electron in a 13-site cluster experiences enough correlation to form a Mott insulator.

The TaS2-based photoelectrocatalyst demonstrates high hydrogen evolution reaction (HER) activity with the onset overpotential below 575 mV vs. reversible hydrogen electrode (RHE).

Here, we operate a 2-terminal TaS 2 device within a scanning transmission electron microscope (STEM) at cryogenic temperature. Through time-resolved electron diffraction and 4D-STEM imaging, we quantify the CDW order parameter during electric biasing, and, via strain analysis, we measure the local sample temperature.