Figure 1
From: Quantum Oscillations at Integer and Fractional Landau Level Indices in Single-Crystalline ZrTe5
ZrTe5 crystal structure.
(a) Schematic top view of a single-layer structure. The dashed red line shows the zigzag chain of Te (adapted from ref. 14). (b) Schematic top view of a two-layer structure. The solid patterns represent the top layer and the dashed the bottom layer. The bottom layer is shifted by a half lattice-constant along the [100]-crystal direction. Due to this shift, one Zr atom overlaps with a Te atom in the projection. (c) STEM high-angle annular dark-field (HAADF) image of ZrTe5 in [010] direction. (d) Zoomed-in image of the unit cell (dashed yellow rectangular) in (c). Red and green circles represent Zr and Te atoms, respectively. The bright spots are due to the overlapping of Zr and Te atoms in the projection. The measured lattice constant c = 1.382 nm and a = 0.396 nm. (e) Corresponding electron diffraction pattern in [010] direction with (200) and (002) planes as marked.
