Pressure-induced structural phase transition and electrical properties of Cu2S

The structural phase transition and electrical properties of Cu2S have been investigated by X-ray diffraction and electrical resistance measurements at pressures up to 41.3 GPa in diamond anvil cell. A new high pressure phase is found above 22.3 GPa, which probably has a tetragonal structure. It is...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-10, Vol.766, p.813-817
Main Authors: Yang, Xue, Jiang, Shu-Qing, Zhang, Hui-Chao, Zhao, Kun-Peng, Shi, Xun, Chen, Xiao-Jia
Format: Article
Language:English
Subjects:
Copper sulfides
Diamond anvil cell
High-pressure
In situ electrical measurement
Structural phase transition
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Summary:The structural phase transition and electrical properties of Cu2S have been investigated by X-ray diffraction and electrical resistance measurements at pressures up to 41.3 GPa in diamond anvil cell. A new high pressure phase is found above 22.3 GPa, which probably has a tetragonal structure. It is observed that the electrical resistance exhibits an insulating behavior at high pressures and low temperature. After the pressure is released, the high pressure phase transforms back to original monoclinic phase. This study sheds light on the electrical transport properties of Cu2S, as well as to improve our understanding of its high pressure phase transition behavior. •The structural phase transitions and electrical properties of Cu2S were investigated up to 41.9 GPa.•A novel pressure-induced phase transition was found above 22.8 GPa.•The high pressure electrical transport properties of Cu2S were revealed.•The structure upon decompression was determined.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.07.037