@article{f1a2133a9e554d79b4e6d72bd6da1a9e,
title = "Reversible structure manipulation by tuning carrier concentration in metastable Cu2S",
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.",
keywords = "CuS, Electron-beam–radiation effects, Phase transition, Structure manipulation",
author = "Jing Tao and Jingyi Chen and Jun Li and Leanne Mathurin and Zheng, {Jin Cheng} and Yan Li and Deyu Lu and Yue Cao and Lijun Wu and Cava, {Robert Joseph} and Yimei Zhu",
note = "Funding Information: ACKNOWLEDGMENTS. We thank Dr. P. D. Johnson and Dr. W. G. Yin for their discussion of the work. We also thank Erik Pollack for help with the ICP-MS measurement at the Arkansas Mass Spectrometry facility. Research was sponsored by the US Department of Energy (DOE) Basic Energy Sciences (BES), by the Materials Sciences and Engineering Division under Contract DE-SC0012704. J.L. was fully supported by the DOE BES Early Career Award Program at Brookhaven National Laboratory under Contract DE-SC0012704. D.L. was supported by the resources of the Center for Functional Nanomaterials, which is a US DOE Office of Science Facility, at Brookhaven National Laboratory. J.-C.Z. was supported by the National Natural Science Foundation of China (11335006 and 51661135011). J.C. and L.M. were supported in part by the University of Arkansas and the National Science Foundation (NSF) through the Center for Advanced Surface Engineering under Grant OIA-1457888 and the Arkansas EPSCoR Program, ASSET III (to J.C.). The work at Princeton University was supported by the NSF Materials Research Science and Engineering Centers Program, Grant DMR-1420541. Publisher Copyright: {\textcopyright} 2017, National Academy of Sciences. All rights reserved.",
year = "2017",
month = sep,
day = "12",
doi = "10.1073/pnas.1709163114",
language = "English (US)",
volume = "114",
pages = "9832--9837",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "37",
}