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PRINCIPAL PUBLICATION AND AUTHORS

Synthesis of epitaxial monolayer Janus SPtSe, R. Sant (a), M. Gay (c), A. Marty (b), S. Lisi (a), R. Harrabi (b), C. Vergnaud (b), M. Tuan Dau (b), X. Weng (b), J. Coraux (a), N. Gauthier (c), O. Renault (c), G. Renaud (b), M. Jamet (b), NPJ 2D Mater. Appl. 4, 41 (2020); https:/doi.org/10.1038/s41699-020-00175-z (a) Univ. Grenoble Alpes and Institut Néel CNRS, Grenoble (France) (b) Univ. Grenoble Alpes and IRIG, CEA-Grenoble (France) (c) LETI, CEA-Grenoble (France)

conserves the pristine epitaxial registry. Figure 142e shows scans along the rods of scattering by PtSe2(33l), and the superlattice (50l and 70l) rods, before and after annealing under H2S. They arise from PtSe2 and SPtSe, respectively, which are sensitive to the Se-by-S substitution in the top layer.

In conclusion, by exposing a 2D TMDC to an H2S gas, it was demonstrated that the substitution of the Se chalcogen atoms by S can be triggered, leading to a new Janus-type material. Thanks to the enhanced Rashba coupling in the structure, such a material could be a new candidate for magnetic memory of the SOT-MRAM type.

Fig. 142: Grazing incidence X-ray scattering (GIXS) measurements.