The introduction of magnetism in two-dimensional (2D) materials represents an intense field of research nowadays and the quest to reach above-room-temperature ordering temperatures is still underway. Intrinsic ferromagnetism was discovered in 2017 in CrI and CrGeTe in the monolayer form with low Curie temperatures. An alternative method to introduce magnetism into conventional 2D materials is substitutional doping with magnetic impurities similarly to three-dimensional diluted magnetic semiconductors. The case of Mn-doped transition metal dichalcogenide (MoS, MoSe, WS, WSe) monolayers is very interesting because combining out-of-plane ferromagnetism and valley contrast leads to ferrovalley materials. In this work, we focus on the incorporation of Mn in MoSe by molecular beam epitaxy on graphene which has been rarely addressed up to now. By using a multiscale characterization approach, we demonstrate that Mn atoms are incorporated into the MoSe monolayer up to 5 atomic percent. However, when incorporated into the film, Mn atoms tend to diffuse to the grain edges forming undefined MoMnSe phase at grain boundaries after completion of the MoSe monolayer. This segregation leaves the crystalline and electronic structure of MoSe unmodified. Above 5%, the saturation of Mn content in MoSe leads to the formation of epitaxial MnSe clusters.
@article{CRPHYS_2021__22_S4_5_0, author = {Maxime Gay and Minh-Tuan Dau and C\'eline Vergnaud and Alain Marty and Fr\'ed\'eric Bonell and Herv\'e Boukari and Colin Paillet and B\'erang\`ere Hyot and Hanako Okuno and Pierre Mallet and Jean-Yves Veuillen and Olivier Renault and Matthieu Jamet}, title = {The search for manganese incorporation {in~MoSe}$_{{2}}$ monolayer epitaxially grown on graphene}, journal = {Comptes Rendus. Physique}, pages = {5--21}, publisher = {Acad\'emie des sciences, Paris}, volume = {22}, number = {S4}, year = {2021}, doi = {10.5802/crphys.69}, language = {en}, }
TY - JOUR AU - Maxime Gay AU - Minh-Tuan Dau AU - Céline Vergnaud AU - Alain Marty AU - Frédéric Bonell AU - Hervé Boukari AU - Colin Paillet AU - Bérangère Hyot AU - Hanako Okuno AU - Pierre Mallet AU - Jean-Yves Veuillen AU - Olivier Renault AU - Matthieu Jamet TI - The search for manganese incorporation in MoSe$_{{2}}$ monolayer epitaxially grown on graphene JO - Comptes Rendus. Physique PY - 2021 SP - 5 EP - 21 VL - 22 IS - S4 PB - Académie des sciences, Paris DO - 10.5802/crphys.69 LA - en ID - CRPHYS_2021__22_S4_5_0 ER -
%0 Journal Article %A Maxime Gay %A Minh-Tuan Dau %A Céline Vergnaud %A Alain Marty %A Frédéric Bonell %A Hervé Boukari %A Colin Paillet %A Bérangère Hyot %A Hanako Okuno %A Pierre Mallet %A Jean-Yves Veuillen %A Olivier Renault %A Matthieu Jamet %T The search for manganese incorporation in MoSe$_{{2}}$ monolayer epitaxially grown on graphene %J Comptes Rendus. Physique %D 2021 %P 5-21 %V 22 %N S4 %I Académie des sciences, Paris %R 10.5802/crphys.69 %G en %F CRPHYS_2021__22_S4_5_0
Maxime Gay; Minh-Tuan Dau; Céline Vergnaud; Alain Marty; Frédéric Bonell; Hervé Boukari; Colin Paillet; Bérangère Hyot; Hanako Okuno; Pierre Mallet; Jean-Yves Veuillen; Olivier Renault; Matthieu Jamet. The search for manganese incorporation in MoSe$_{{2}}$ monolayer epitaxially grown on graphene. Comptes Rendus. Physique, Volume 22 (2021) no. S4, pp. 5-21. doi : 10.5802/crphys.69. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.69/
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