Sb2S3 Craystal

Antimony sulfide is the chemical compound with the formula Sb2S3 which crystallizes in an orthorhombic space group. Sb2S3 shares striking structural and physical similarities with topological insulator Sb2Te3. The orthorhombic phase of Sb2S3 belongs to the space group Pnma (number:62) Recently, Sb2S3 has been shown to exhibit topological state transition under pressure [1]. Sb2S3 crystals exhibit optical band gap at 1.7 -1.8 eV [2] while optical and electronic properties in the monolayer form remain unknown.

The only commercially available topological insulator thalium alloyed BiTlTe (bismuth thallium telluride) crystals. Tl has been alloyed into Bi2Te3 matrix to create Bi(2-x)TlxTe3 crystals at x=0.7 and x=1.3 ranges. BiTlTe (thalium doped Bi2Te3 crystals) are largely unexplored layered material with promising topological behavior, thermoelectric, and piezeelectric performance.

Properties of Thalium alloyed Bi2Te3 (Bi2-xTlxTe3) crystals