[20p-A602-1~16] CS.7 Code-sharing Session of 4.5 & 17

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)English Presentation

[20p-A602-5] Tracking Optical Properties During Atomic Substitution Process
from MoSe₂ to Janus MoSeS

〇Hiroo Suzuki¹, Masaaki Misawa², Yingzhe Wang¹, Kenji Tsuruta¹, Yasuhiko Hayashi¹ (1.Okayama Univ., 2.FIT)

Keywords:

Janus transition metal dichalcogenide,Atomic substitution,Raman spectroscopy

Janus transition metal dichalcogenide (TMDC) is a TMDC with two different chalcogenide elements on the upper and lower surfaces. This special structure is reported to break the out-of-plane symmetry of the monolayer TMDC and produce out-of-plane polarization. In this study, Janus MoSeS was produced using the S-containing H₂ plasma (H₂/S-plasma) with surface atomic substitution of monolayer MoSe₂. As such, the repeated power-controlled plasma treatment enabled the investigation of the intermediated partially substituted Janus state between MoSe₂ and Janus MoSeS. In this talk, we will report the transition of structural and optical properties of the intermadiate state between MoSe₂ and Janus MoSeS during the atomic substitution process.