High-pressure phase diagram of ZnSexTe1-x alloys

We have performed high-pressure energy dispersive x-ray diffraction experiments in ZnSexTe1-x alloys (x=0, 0.1, 0.2, 0.55, 0.81, 0.93, 0.99, and 1.0) in order to establish their pressure-composition phase diagram, and characterize the equation of state of all the involved phases. We conclude that the electronic energy-volume dependence is similar in all compounds. The differences observed in the stability range of the cinnabar and Cmcm phases should then be discussed in terms of other factors, as the presence of energy barriers (cinnabar) or dynamical instabilities (Cmcm). We also argue that the cinnabar phase found is similar for all compositions. Finally we discuss the different compressibility observed in the Cmcm and rocksalt phases