Fig. 1

The XRD spectra of the \(\hbox{WSe}_{2}\), \(\hbox{WSe}_{1.9}\hbox{Te}_{0.1}\) and \(\hbox{WSe}_{1.8}\hbox{Te}_{0.2}\) single crystals. The peak positions are consistent with the database of the \(\hbox{WSe}_{2}\) crystal. The peak shift is observed in the \(\hbox{WSe}_{1.9}\hbox{Te}_{0.1}\) and \(\hbox{WSe}_{1.8}\hbox{Te}_{0.2}\). The shift of the diffraction peaks to lower angles in the crystal with more Te atoms replacement reflects an enlargement of the lattice constants with increasing Te content. The X-ray diffraction database is JCPDS No. 89-5257