Extended Data Fig. 1: Selected area electron diffraction patterns detecting no lattice instabilities near T = 100 K.
From: Topological excitonic insulator with tunable momentum order
a, Atomic-resolution image of the (010) surface of a lamella captured by scanning transmission electron microscopy, demonstrating a consistent atomic arrangement when compared to pristine Ta2Pd3Te5 (010) crystallographic structure. b, Selected area electron diffraction patterns obtained from the focused-ion-beam cut lamella at T = 290 K (top) and 90 K (bottom). The patterns exhibit identical crystal lattice at both temperatures, detecting no structural phase change in this temperature range. c, Atomic-resolution scanning transmission electron microscopy image of the (001) surface, revealing a consistent atom arrangement when compared to pristine Ta2Pd3Te5 (001). d, Selected area electron diffraction patterns acquired from the focused-ion-beam cut lamella at T = 290 K (top) and 90 K (bottom). Akin to panel b, the patterns demonstrate the same crystal lattice at both temperatures. The temperature-dependent selected area electron diffraction patterns detect no structural phase transition around 100 K.
