| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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LaB$_{6}$ Work Function and Structural Stability under High Pressure |
| Peng-Shan Li1,2, Wei-Ran Cui1,2, Rui Li1, Hua-Lei Sun1, Yan-Chun Li1, Dong-Liang Yang1, Yu Gong1, Hui Li3**, Xiao-Dong Li1** |
1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
2University of Chinese Academy of Sciences, Beijing 100049
3Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124
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| Cite this article: |
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Peng-Shan Li, Wei-Ran Cui, Rui Li et al 2017 Chin. Phys. Lett. 34 076201 |
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Abstract The work functions of the (110) and (100) surfaces of LaB$_{6}$ are determined from ambient pressure to 39.1 GPa. The work function of the (110) surface slowly decreases but that of the (100) surface remains at a relatively constant value. To determine the reason for this difference, the electron density distribution (EDD) is determined from high-pressure single-crystal x-ray diffraction data by the maximum entropy method. The EDD results show that the chemical bond properties in LaB$_{6}$ play a key role. The structural stability of LaB$_{6}$ under high pressure is also investigated by single-crystal x-ray diffraction. In this study, no structural or electronic phase transition is observed from ambient pressure to 39.1 GPa.
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Received: 10 March 2017
Published: 23 June 2017
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11274030 and 11474281. |
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