Fig. 1: Crystal structure and Raman characteristics of Ta2NiSe5.
From: Gate tuning of coupled electronic and structural phase transition in atomically thin Ta2NiSe5
a Crystal structure of Ta2NiSe5 in the orthorhombic phase. The arrows in the lower part indicate atomic displacement in the monoclinic phase. b, c Temperature-dependent Raman spectra (b) and the corresponding intensity color plot (c) of bulk Ta2NiSe5. d Polarization-angle-dependent Raman intensity color plot of bulk Ta2NiSe5 at 300 K. e Fitting analysis of the low-energy Raman conductivity of bulk Ta2NiSe5 at 300 K. f Thickness-dependent Raman spectra of Ta2NiSe5 at 150 K. All data except those in d were collected in the crossed polarization (ac) configuration.
