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
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.
Teredesai P, Muthu D V S, Chandrabhas N, Meenakshi S, Vijayakumar V, Modak P, Rao R S, Godwal B K, Sikka S K and Sood A K 2004 Solid State Commun.129 791
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Baranovskiy A E, Grechnev G E, Fil V D, Ignatova T V, Logosha A V, Panfilov A S, Svechkarev I V, Shitsevalova N Y, Filippov V B and Eriksson O 2007 J. Alloys Compd.442 228
2017, Vol. 34 
