Electrical properties and phase transition of CdTe under high pressure
Electrical properties and phase transition of CdTe under high pressure
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高压下 CdTe 的电性能和相变
DOI：
10.1088/0953-8984/19/42/425223
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发表时间：
2007-10
影响因子：
2.7
通讯作者：
He Chunyuan
中科院分区：
文献类型：
--
作者：
Huang Xiaowei;Liu Hongwu;Wang Yue;Liu Bingguo;Zhang Dongmei;Li Ming;Ma Yanzhang;Zou Guangtian;Yu Cuiling;Gao Chunxiao;Hao Aimin;He Chunyuan
在高压下用金刚石对顶砧装置测量了粉末状CdTe的电阻率。随着压力从2.7 GPa增加到3.8 GPa，观察到电阻率急剧下降超过三个数量级。这是由于岩盐CdTe的出现。在6.5GPa左右出现了一个以前没有报道过的电阻率极化子。这是由于岩盐CdTe的布里渊区在某些对称方向上的带隙明显减小所致。在6.5 ~ 10 GPa压力范围内，电阻率下降趋势逐渐平缓。在约10 GPa时，可分辨出对应于向Cmcm相转变的尖点。在10 ~ 38 GPa之间，在15.5GPa、22.2GPa和30 GPa处检测到三个跃变点，表明CdTe存在丰富的电子相变。在液氮温度（77 K）到450 K的宽温度范围内进行了电阻率测量。结果表明，岩盐CdTe不具有典型的金属输运特性。在6.0-7.0 GPa的压力范围内，CdTe具有约445 meV的带隙。用lnρ与1/T的关系进行了线性拟合，得到了不同气压下杂质的电离能。
In situ electrical resistivity measurement of powdered CdTe has been performed under high pressure using a diamond anvil cell equipped with a microcircuit. With the pressure increasing from 2.7 to 3.8 GPa, a sharp decrease in resistivity of over three orders of magnitude is observed. This is due to the appearance of rock-salt CdTe. At about 6.5 GPa a resistivity inflexion appears which has not been reported before. It is caused by the obvious decrease of band gap in certain symmetry directions of the Brillouin zone of rock-salt CdTe. From 6.5 to 10 GPa, the descending trend of the resistivity turns gently. At about 10 GPa, a cusp corresponding to the transition to the Cmcm phase is distinguished. Between 10 and 38 GPa, three leap points have been detected at 15.5 GPa, 22.2 GPa and 30 GPa, which imply abundant electronic phase transitions of CdTe. Resistivity measurements were also performed in a wide temperature range from liquid nitrogen temperature (77 K) to 450 K. It is proved that rock-salt CdTe does not show a typical metallic transport character. In the pressure range of 6.0–7.0 GPa, CdTe has a band gap of about 445 meV. The relationship of lnρ to 1/T is also fitted linearly to yield the ionization energy of impurities at different pressures.
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DOI：
10.1103/physrevb.48.1314
发表时间：
1993-07
期刊：
Physical review. B, Condensed matter
影响因子：
--
作者：
Nelmes;McMahon;Wright;Allan
通讯作者：
Nelmes;McMahon;Wright;Allan
影响因子：
3.2
作者：
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通讯作者：
S. Minomura;G. Samara;H. G. Drickamer
影响因子：
4
作者：
N. B. Owen;P. L. Smith;J. Martin;A. J. Wright
通讯作者：
N. B. Owen;P. L. Smith;J. Martin;A. J. Wright
影响因子：
4
作者：
I. Borg;D. K. Smith
通讯作者：
I. Borg;D. K. Smith
DOI：
10.1002/pssb.200301612
发表时间：
2003-02
期刊：
physica status solidi (b)
影响因子：
--
作者：
H. S. Güder;S. Gilliland;J. Sans;A. Segura;J. González;I. Mora;V. Muñoz;A. Muñoz
通讯作者：
H. S. Güder;S. Gilliland;J. Sans;A. Segura;J. González;I. Mora;V. Muñoz;A. Muñoz