論文

査読有り
2017年12月

Exciton Hall effect in monolayer MoS2

NATURE MATERIALS
  • Masaru Onga
  • ,
  • Yijin Zhang
  • ,
  • Toshiya Ideue
  • ,
  • Yoshihiro Iwasa

16
12
開始ページ
1193
終了ページ
+
記述言語
ウェールズ語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/NMAT4996
出版者・発行元
NATURE PUBLISHING GROUP

The spontaneous Hall effect driven by the quantum Berry phase (which serves as an internal magnetic flux in momentum space) manifests the topological nature of quasiparticles and can be used to control the information flow, such as spin and valley(1,2). We report a Hall effect of excitons (fundamental composite particles of electrons and holes that dominate optical responses in semiconductors(3)). By polarization-resolved photoluminescence mapping, we directly observed the Hall effect of excitons in monolayer MoS2 and valley-selective spatial transport of excitons on a micrometre scale. The Hall angle of excitons is found to be much larger than that of single electrons in monolayer MoS2 (ref. 4), implying that the quantum transport of the composite particles is significantly affectedby their internal structures. Thepresent result not only poses a fundamental problem of the Hall effect in composite particles, but also offers a route to explore exciton-based valleytronics in two-dimensional materials.

Web of Science ® 被引用回数 : 46

リンク情報
DOI
https://doi.org/10.1038/NMAT4996
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000416159700011&DestApp=WOS_CPL