| AVS 64th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Thursday Sessions |
| Session 2D-ThP |
| Session: | 2D Materials Poster Session |
| Presenter: | Manuel Bonilla, University of South Florida |
| Authors: | M. Bonilla, University of South Florida S. Kolekar, University of South Florida H. Coy Diaz, University of South Florida Y. Ma, University of South Florida M. Batzill, University of South Florida |
| Correspondent: | Click to Email |
VSe2 has been proposed to be ferromagnetic in single- to few- layer form. However, the high reactivity of VSe2 makes mechanical exfoliation to single layers and subsequent magnetic characterization challenging. Here we grow VSe2 by molecular beam epitaxy in ultra-high vacuum. We characterize the film-growth and materials properties in-situ by scanning tunneling microscopy/spectroscopy and photoemission spectroscopy. High quality single- to few- layer materials are obtained, with the well-known charge density wave transition for bulk VSe2 persisting to monolayer material. For magnetic characterizations we protect the single- to few- layer materials from oxidation by a few nanometer thick selenium capping layer. We observe a strong ferromagnetism for the single layer, which decreases with number of layers. This study shows that VSe2 single layer is indeed a promising 2D ferromagnetic material, whose magnetic properties can be tuned by the layer thickness.