As2Te3

As2Te3

As2Te3 (Arsenicum Telluride)

砷化碲

As2Te3 (alpha phase) is a semiconductor (~0.2-0.3 eV), thermoelectric material and a topological insulator. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. α-As2Te3 belongs to the group-15 metalloid trichalcogenides. 

The Arsenicum Telluride crystals have a typical lateral size of ~0.6-0.8 cm. The crystals are rectangular shaped and have a metallic appearance. 

As2Te3 crystal properties

The single crystal As2Te3 is characterized using:

XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker) 
EDX:Energy-dispersive X-ray spectroscopy for stoichiometric analysis 
Raman: 785nm Raman system 

Raman, XRD and EDX on As2Te3:

Click on an image to zoom

Powder X-ray diffraction (XRD) of a single crystal As2Te3. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.

Stoichiometric analysis of a single crystal As2Te3 by Energy-dispersive X-ray spectroscopy (EDX).

Raman spectrum of a single crystal As2Te3. Measurement was performed with a 785 nm Raman system at room temperature.