Figure 2.

Microscopic atomic structure of the synthesized Ta₂NiSe₅. a,b) Top surface and cross‐section High‐magnification STEM image of the Ta₂NiSe₅ nanosheet (zone axis = [010] and [001]), respectively. Inset is the atomic structure diagram of Ta₂NiSe₅. c,d) Corresponding FFT diffraction pattern of top surface and cross‐section STEM image. e) Intensity line profile of the atomic image for red rectangle dashed box in (a). f) EDX spectroscopy of the Ta₂NiSe₅ nanosheet. Inset is the atomic ratio of Ta, Ni, and Se.