Fig. 3: Changes in dimensions and color of (MV)BiBr5 single crystals under external stress. | Nature Communications

Fig. 3: Changes in dimensions and color of (MV)BiBr5 single crystals under external stress.

From: Pressure-induced shape and color changes and mechanical-stimulation-driven reverse transition in a one-dimensional hybrid halide

Fig. 3

a The predicted single crystal morphologies of phases β and γ based on BFDH model. b A single crystal was slowly compressed from 0.15 to 0.20 GPa (~0.2 GPa/h) and the coexistence of phase β to γ was observed. The phase β was completely transformed to γ over ~12 h and this phase was maintained after the pressure release to ambient pressure (see air bubbles). c A single crystal was compressed from 0.12 GPa (β phase) to 0.75 GPa (γ phase) in the DAC chamber and depressurized to 0.1 MPa. The γ phase reverts back to the β phase after mechanical stimulation (poking with a needle). The scale bars (white bars) are displayed in both b and c panels.

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