High-Pressure Synthesis and Thermal Transport Properties of Polycrystalline BAs_x  

作　　者：Lei Gao Qiulin Liu Jiawei Yang Yue Wu Zhehong Liu Shijun Qin Xubin Ye Shifeng Jin Guodong Li Huaizhou Zhao Youwen Long 高磊;刘求林;杨佳伟;吴跃;刘哲宏;覃湜俊;叶旭斌;金士峰;李国栋;赵怀周;龙有文(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Heavy Oil Processing,College of New Energy and Materials,China University of Petroleum,Beijing 102249,China;Yangtze River Delta Physics Rearch Center,Liyang 213300,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Heavy Oil Processing,College of New Energy and Materials,China University of Petroleum,Beijing 102249,China [4]Yangtze River Delta Physics Rearch Center,Liyang 213300,China [5]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics Letters》2020年第6期53-56,共4页中国物理快报（英文版）

基　　金：Supported by the National Key R&D Program of China(Grant Nos.2018YFE0103200 and 2018YFA0305700);the National Natural Science Foundation of China(Grant Nos.51772324,11934017,11921004,and 11574378);the Chinese Academy of Sciences(Grant Nos.QYZDB–SSW–SLH013 and GJHZ1773)。

摘　　要：Polycrystalline BAsx(x=0.80-1.10)compounds with different boron-to-arsenic elemental molar ratios were synthesized by a high-pressure and high-temperature sintering method.Compared with other ambient-pressure synthesis methods,high pressure can significantly promote the reaction speed as well as the reaction yield.As the content of arsenic increases from x=0.91 to 1.10,the thermal conductivity of BAsx gradually increases from 53 to 65 W·m-1·K-1.Furthermore,the temperature dependence of thermal conductivities of these samples reveals an Umklapp scattering due to the increasing phonon population.This work provides a highly efficient method for polycrystalline BAs synthesis.

关 键 词：synthesis. method. ARSENIC 

分 类 号：O469[理学—凝聚态物理]