Quasiparticle scattering in type-II Weyl semimetal MoTe2
Quasiparticle scattering in type-II Weyl semimetal MoTe2
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DOI：
10.1088/1361-648x/aaab95
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Chun-Liang Lin;R. Arafune;E. Minamitani;M. Kawai;N. Takagi
中科院分区：
文献类型：
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作者：
Chun-Liang Lin;R. Arafune;E. Minamitani;M. Kawai;N. Takagi
用扫描隧道显微镜和密度泛函理论计算研究了第二类Weyl半金属二碲化钼（MoTe 2）的电子结构.利用低温扫描隧道显微镜对能量相关准粒子干涉（QPI）图样进行了测量，发现了QPI图样的一些特征。其中两个产生于外尔半金属性质;一个是拓扑费米弧表面态，另一个可以指定为外尔点。其余的结构来自于与体电子态相关的散射。这一发现有助于进一步了解II型Weyl半金属MoTe 2的拓扑电子结构。
The electronic structure of type-II Weyl semimetal molybdenum ditelluride (MoTe2) is studied by using scanning tunneling microscopy and density functional theory calculations. Through measuring energy-dependent quasiparticle interference (QPI) patterns with a cryogenic scanning tunneling microscope, several characteristic features are found in the QPI patterns. Two of them arise from the Weyl semimetal nature; one is the topological Fermi arc surface state and the other can be assigned to be a Weyl point. The remaining structures are derived from the scatterings relevant to the bulk electronic states. The findings lead to further understanding of the topological electronic structure of type-II Weyl semimetal MoTe2.