4.6 Article

Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2

期刊

NEW JOURNAL OF PHYSICS
卷 22, 期 10, 页码 -

出版社

IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/abbca5

关键词

plasmon; topological semimetal; high resolution electron energy loss spectroscopy

资金

  1. National Natural Science Foundation of China [11874404, 11634016]
  2. National Key R&D Program of China [2016YFA0302400, 2017YFA0303600, 2016YFA0300600]
  3. Strategic Priority Research Program of Chinese Academy of Sciences [XDB30000000, XDB33000000]
  4. Youth Innovation Promotion Association of Chinese Academy of Sciences [2016008]
  5. BAQIS Research Program [Y18G09]
  6. Beijing Natural Science Foundation [Z180008]
  7. High Magnetic Field Laboratory of Anhui Province

向作者/读者索取更多资源

In many realistic topological materials, more than one kind of fermions contribute to the electronic bands crossing the Fermi level, leading to various novel phenomena. Here, using momentum-resolved inelastic electron scattering, we investigate the plasmons and their evolution across the phase transition in a type-II Weyl semimetal MoTe2, in which both Weyl fermions and trivial electrons contribute to the Fermi surface in theT(d)phase. One plasmon mode in the 1T ' phase at high temperature and two plasmon modes in the topologicalT(d)phase at low temperature are observed. Combining with first-principles calculations, we show that all the plasmon modes are dominated by the interband correlations between the inverted bands of MoTe2. Especially in theT(d)phase, since the electronic bands split due to inversion symmetry breaking and spin-orbit coupling, the plasmon modes manifest the interband correlation between the topological Weyl fermions and the trivial electrons. Our work emphasizes the significance of the interplay between different kinds of carriers in plasmons of topological materials.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据