Figure 1
From: Metallic ground states of undoped Ti2O3 films induced by elongated c-axis lattice constant
Investigation of corundum-type crystal structure in the Ti2O3 films. Raman spectra of (a) HT- and (b) LT-Ti2O3 films measured at RT. The spectra were collected using YAG (dotted lines) and He–Ne (solid lines) lasers. Vibrational modes (A1g or Eg) are indicated in the spectrum of the HT-Ti2O3 film recorded using He–Ne laser. The triangle in (b) indicates the peak related to the low-frequency A1g mode. The asterisk indicates the peak from the α-Al2O3 substrate.
