Center for Integrated Nanostructure Physics

After the discovery of graphene, numerous van der Waals (vdW) layered materials have been explored for a decade including insulators, topological insulators, semiconductors, Weyl semimetals, metals, and superconductors. Recently, the antiferro- and ferromagnetic orders have been observed in two-dimensional materials. This gives rise to great opportunities for the modulation of magnetic properties via strain, surface doping as well as electrical gate insulator. In addition, the atomically thin vdW magnetic materials can be intimately heterostructured to unveil the proximity effects with other material, for example, magnetism (ferro- or antiferro-) materials, topological insulator, and superconductivity in contrast to ambiguous proximity effects in bulk heterostructures. Our long-term vision of this team is to explore the 2D magnetism in van der Waals layered semiconductor materials toward the high Curie temperature, which can be applied for future spintronics at room temperature.

Key publications

1. S. J. Yun, D. L. Duong, M.-H. Doan, K. Singh, T. L. Phan, W. Choi, Y.-M. Kim, Young Hee Lee. Room-temperature ferromagnetism in monolayer WSe2 semiconductor via vanadium dopant. Adv. Sci. 7, 1903076 (2020).

2. Dinh Loc Duong, Seok Joon Yun, Youngkuk Kim, Seong-Gon Kim, Young Hee Lee. Long-range ferromagnetic ordering in vanadium-doped WSe₂ semiconductor. Appl. Phys. Lett. 115, 242406 (2019).

3. Bumsub Song, Seok Joon Yun, Jinbao Jiang, Kory Beach, Wooseon Choi, Young-Min Kim, Humberto Terrones, Young Jae Song, Dinh Loc Duong, and Young Hee Lee. Evidence of itinerant holes for long-range magnetic order in tungsten diselenide semiconductor with vanadium dopants. (Submitted)

4. Dinh Loc Duong, Seong-Gon Kim, Young Hee Lee. Gate modulation of long-range magnetic order in vanadium-doped WSe2 semiconductor. (Submitted)