[20a-A202-1~9] 17.3 Layered materials

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[20a-A202-8] Symmetry engineering of WTe₂ using twisted van der Waals assembly

〇Yijin Zhang¹, Keisuke Kamiya¹, Takato Yamamoto², Masato Sakano², Xiaohan Yang¹, Satoru Masubuchi¹, Shota Okazaki⁴, Keisuke Shinokita³, Kenji Watanabe⁵, Takashi Taniguchi⁵, Kazunari Matsuda³, Takao Sasagawa⁴, Kyoko Ishizaka^2,6, Tomoki Machida¹ (1.IIS Univ. Tokyo, 2.Univ. Tokyo, 3.IAE Kyoto Univ., 4.MSL Tokyo Tech., 5.NIMS, 6.CEMS RIKEN)

Keywords:

two-dimensional material,van der Waals,Symmetry

In this study, we fabricated artificially stacked multilayer WTe₂ using twisted van der Waals assembly. By varying the twist angle, which is the angle between the crystal axis of each layer, we succeeded to control the spatial inversion symmetry of the assembled stack. The change in the symmetry further modulates the physical properties such as the band structure including a spin splitting as large as 100 meV. Our study revealed that the twisted van der Waals assembly is a great technique for pursuing novel physical properties using two dimensional materials from the view point of the symmetry engineering.