[10a-Z29-1~14] 17.3 Layered materials

[10a-Z29-2] Structure evaluation of MoS_2(1-x)Te_2x alloy through Mo chemical binding states analysis

〇Yusuke Hibino^1,2, Kota Yamazaki¹, Yusuke Hashimoto¹, Hideaki Machida³, Masato Ishikawa³, Hiroshi Sudoh³, Hitoshi Wakabayashi⁴, Atsushi Ogura^1,5 (1.Meiji Univ., 2.JSPS Research Fellow, 3.Gas Phase Growth Ltd., 4.Tokyo Tech, 5.MREL)

Keywords:transition metal dichalcogenides, alloy, X-ray photoelectron spectroscopy

The research on alloys of layered materials are progressing further and further recently. However, phase separation seen in, for example alloy of graphene and h-BN is one issue that needs to be solved. The same applies to the alloy of MoS₂ and MoTe₂. Confrimation of whether there is phase separation or not is a cricitical evaluation in alloy, and non-destructive and easy-to-perform method is preferred. In this study we propose a method using X-ray photoelectron spectroscopy. It is expected that performing 2 peak-fitting for Mo 3d orbital for MoS_2(1-x)Te_2x and examining the difference in the peak energy values would reveal whether the sample shows phase separation or not. In this presentation, we report how the 2 peak-fitting results for uniform alloy and actual samples with phase separation.