fig2

Figure 2. (A) High-resolution transmission electron microscopy (HR-TEM) image of the HEA nanoparticles and BST matrix in the BST+HEA_x (x = 0.1 vol%) sample; (B) the lattice sparing corresponding to the (009) plane of the BST structure; (C) the TEM image of the x = 0.1 vol% sample with the elemental mapping of bismuth (Bi), antimony (Sb), tellurium (Te), tantalum (Ta), niobium (Nb), hafnium (Hf), zirconium (Zr), and titanium (Ti). HEA: High entropy alloy; BST: Bi_0.4Sb_1.6Te₃.