Measurement of Ultrasound Velocity in the Single Crystal of Black Phosphorus up to 3.3 GPa Gas Pressure
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The effect of hydrostatic pressure on the elastic constants of the single crystal black phosphorus is studied by using a gas pressure apparatus. Neon gas is used as the pressure transmitting medium. A large single crystal of orthorhombic black phosphorus with the dimensions of 5×3×6 mm<SUP>3</SUP>, has been grown under the condition of 1 GPa and 900°C by using a large solid isotropic compression system. The ultrasound wave velocity is measured by a pulse transmission method up to 3.3 GPa. The longitudinal wave velocities along <I>X</I> and <I>Y</I> axes decreased, while that along <I>Z</I> axis increased. An anomaly was observed around 1.7 GPa, which may be attributed to the vanishing of the energy gap of black phosphorus.
- 社団法人 日本物理学会の論文
社団法人 日本物理学会 | 論文
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