Cd1-xZnxTe Electrical Properties, the Equation of State and Phase Transitions under High Pressure
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摘要: 在金刚石压砧装置上,采用电阻和电容测量方法研究了Cd1-xZnxTe(x=0.04)在室温下、17 GPa内的电阻、电容与压力的关系。实验结果表明,它在3.1 GPa左右和5 GPa左右发生了两次电子结构相变,而在3.1 GPa以上和5.7 GPa左右发生了两次晶体结构相变。同时,还在活塞-圆筒测量装置上研究了Cd1-xZnxTe(x=0.04)在室温下、4.5 GPa内的p-V关系。实验结果表明它在3.8 GPa左右发生了相变。本工作还给出了它在相变前后的状态方程,以及它的Grneisen参数0、体弹模量B0 与B0 的压力导数B0。Abstract: Resistance-and capacitance-pressure relationships for Cd1-xZnxTe (x=0.04) at room temperature and in the pressure range up to 17 GPa were measured in a diamond anvil cell. Experimental results indicate that Cd1-xZnxTe (x=0.04) undergoes two electronic structure transitions at about 3.1 GPa and 5 GPa, and two crystal structure transitions at above 3.1 GPa and about 5.7 GPa. p-V relationship for Cd1-xZnxTe (x=0.04) at room temperature and in the pressure range up to 4.5 GPa was also obtained using a piston-cylinder type device. Experimental results show that a phase transition in Cd1-xZnxTe (x=0.04) occurs at about 3.8 GPa. Its equations of state before and after the phase transition, Grneisen parameter 0, bulk modulus B0 and the first order pressure derivative B0 of B0 are also given.
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Key words:
- resistance /
- capacitance /
- equation of state /
- phase transition
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