Figure 1. Structural characterizations of Cl-doped SnSe₂.

(a) Schematics of crystal structure of Cl-doped SnSe₂ along b- (upper) and c-axis (lower). (b) The patterns of powder X-ray diffraction from various amount of Cl-doped SnSe₂ samples [A: undoped (n_e = 7.2 × 10¹⁷cm⁻³), B–H: doped samples with increasing Cl doping ratio from B (n_e = 5.1 × 10¹⁸cm⁻³) to H (n_e = 8.6 × 10¹⁹cm⁻³)]. Reference peak positions of SnSe₂ are displayed at the bottom of the graph. Representative lattice planes are indicated and SnSe impurity phase is marked with arrows and asterisk, respectively.