Fig. 2: Conversion from PtTe2 to PtTe/PtTe2 heterostructure. | Nature Communications

Fig. 2: Conversion from PtTe2 to PtTe/PtTe2 heterostructure.

From: Giant Rashba splitting in PtTe/PtTe2 heterostructure

Fig. 2

a Crystal structure of PtTe2 and PtTe/PtTe2 (side view). b Raman spectra of PtTe2, PtTe/PtTe2 and PtTe films. c Rotational anisotropy SHG pattern of PtTe/PtTe2 heterostructure consisting of 1 ML PtTe and 1 ML PtTe2, with the polarization of SHG signal parallel (red) or perpendicular (purple) to the incident laser. d SHG signals measured in multi-layer PtTe/PtTe2 heterostructures, which were obtained by annealing 2N layers of PtTe2 (N is an integer). e Extracted SHG intensity measured on samples obtained by annealing 2N layers of PtTe2. The signal is normalized by the intensity of PtTe/PtTe2 heterostructure. The error bar is smaller than the symbol size. f STEM image of converted multilayer PtTe/PtTe2 heterostructure on bilayer graphene/SiC substrates.

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