[15p-M_124-1~16] 17.3 Layered materials

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-M_124-1] Mirror Twin Boundary Formation in WSe₂ by Nb Post-doping

〇(M2)Itsuki Tanaka¹, Tomonori Nishimura¹, Kaito Kanahashi¹, Mai Nakashima², Naoshi Kakeya², Kohei Aso², Yoshifumi Oshima², Jui-Han Fu³, Vincent Tung³, Kouske Nagashio¹ (1.UTokyo Material, 2.JAIST, 3.UTokyo Chem. Sys.)

Keywords:

two-dimensional material,TMDC,doping

We investigated post-doped Nb–WSe₂ prepared by an intermittent-flux method using HAADF-STEM, confirming Nb substitution at W sites (up to 11.3%) and the formation of MTB loops. The MTB regions are transition-metal-rich, suggesting a substitution mechanism in which surface-adsorbed Nb diffuses and is incorporated into the lattice. Lowering the Nb flux and controlling the defect density are key to achieving higher substitution levels.