Berry curvature dipole current in the transition metal dichalcogenides family

Jhih Shih You, Shiang Fang, Su Yang Xu, Efthimios Kaxiras, Tony Low

研究成果: 雜誌貢獻期刊論文同行評審

86 引文 斯高帕斯(Scopus)

摘要

We study the quantum nonlinear Hall effect in two-dimensional (2D) materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in the second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition metal dichalcogenides (TMDCs). First, we use an ab initio based tight-binding approach to demonstrate that monolayer Td-structure TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of a finite Berry curvature dipole with the application of strain and an electrical displacement field, respectively.

原文英語
文章編號121109
期刊Physical Review B
98
發行號12
DOIs
出版狀態已發佈 - 2018 9月 25
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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