【摘 要】
：
In last decades,topological materials[1-3]have attracted lots of research interest.Topological Kondo insulator(TKI)[4],as an exotic quantum state,has been propo
【机 构】
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School of Materials Science and Engineering, Hefei University of Technology,Division of Materials Sc
【出 处】
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Science China(Physics,Mechanics & Astronomy)
论文部分内容阅读
In last decades,topological materials[1-3]have attracted lots of research interest.Topological Kondo insulator(TKI)[4],as an exotic quantum state,has been proposed theoretically in two hexaborides Sm B6and Yb B6,in which there is a d/f(p)band inversion at momentum point X[5].There are lots of experimental work supporting the TKI state and metallic surface state in typical Kondo insulator Sm B6[6-10].However,more and more experimental results demonstrated that Yb B6is trivial insulator at ambient pressure[11].Under high pressure,the band gap of Yb B6will close and the d/p band inversion can happen under pressure about 15 GPa[12].
In last decades, topological materials [1-3] have attracted lots of research interest. Topological Kondo Insulators (TKIs) [4], as an exotic quantum state, has been proposed theoretically in two hexaborides Sm B6 and Yb B6, in which there is is There are lots of experimental work supporting the TKI state and metallic surface state in typical Kondo insulator Sm B6 [6-10]. However, more, more and more an experimental work that Yb B6is trivial insulator at ambient pressure [11]. Under high pressure, the band gap of Yb B6will close and the d / p band inversion can happen under pressure about 15 GPa [12].
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