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Reversible structure manipulation by tuning carrier concentration in metastable Cu2S.

Author(s): Tao, Jing; Chen, Jingyi; Li, Jun; Mathurin, Leanne; Zheng, Jin-Cheng; et al

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Abstract: The optimal functionalities of materials often appear at phase transitions involving simultaneous changes in the electronic structure and the symmetry of the underlying lattice. It is experimentally challenging to disentangle which of the two effects--electronic or structural--is the driving force for the phase transition and to use the mechanism to control material properties. Here we report the concurrent pumping and probing of Cu2S nanoplates using an electron beam to directly manipulate the transition between two phases with distinctly different crystal symmetries and charge-carrier concentrations, and show that the transition is the result of charge generation for one phase and charge depletion for the other. We demonstrate that this manipulation is fully reversible and nonthermal in nature. Our observations reveal a phase-transition pathway in materials, where electron-induced changes in the electronic structure can lead to a macroscopic reconstruction of the crystal structure.
Publication Date: Sep-2017
Citation: Tao, Jing, Chen, Jingyi, Li, Jun, Mathurin, Leanne, Zheng, Jin-Cheng, Li, Yan, Lu, Deyu, Cao, Yue, Wu, Lijun, Cava, Robert Joseph, Zhu, Yimei. (2017). Reversible structure manipulation by tuning carrier concentration in metastable Cu2S.. Proceedings of the National Academy of Sciences of the United States of America, 114 (37), 9832 - 9837. doi:10.1073/pnas.1709163114
DOI: doi:10.1073/pnas.1709163114
ISSN: 0027-8424
EISSN: 1091-6490
Pages: 114.37:9832 - 9837
Language: eng
Type of Material: Journal Article
Journal/Proceeding Title: Proceedings of the National Academy of Sciences of the United States of America
Version: Final published version. This is an open access article.
Notes: Proceedings of the National Academy of Sciences of the United States of America Volume 114, Issue 37, 12 September 2017, Pages 9832-9837. First published August 30, 2017.



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