Researchers report a van der Waals (vdW) epitaxial growth of layer-structured BST alloy on graphene substrate as a proof of concept. They have successfully synthesized a high-quality epitaxial BST film on graphene transferred onto amorphous silica by the pulsed laser deposition (PLD) technique. The resultant high-quality epitaxial Bi0.5Sb1.5Te3 (BST) alloy thin film yields a high power factor of approximately 4.67 mW K-2 m-1 at 300 K, comparable to BST single crystal, as the surface of graphene substrate promotes a stable epitaxial growth of layered material, resulting in good crystallinity as well as low defect density of the film.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering