[8p-N302-1~20] 17.3 Layered materials

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8p-N302-11] Real space visualization of structural domains in SnS using valley properties

〇Daiki Sekine¹, Genshiro Hiraoka², Sota Yamamoto², Jun Ishihara², Makoto Kohda^1,2,3,4 (1.QUARC, QST, 2.Grad. Sch. of Eng., Tohoku Univ., 3.CSIS, Tohoku Univ., 4.DEFS, Tohoku Univ.)

Keywords:

2D materials,valleytronics,domain imaging

A group IV monochalcogenide SnS is a two-dimensional layered semiconductor with a puckered structure, and has an in-plane anisotropic valley structure. We recently succeeded in fabricating SnS with structural (ferroelastic) and ferroelectric domains. By utilizing the optical transition selection rules, we expect different luminescence at different domains. In this study, we visualize the structural domains by means of photoluminescence, and clarify the properties of domains from the viewpoint of valley degree of freedom.