Junyeong Ahn

Non-reciprocal topological solitons in active metamaterials

Evidence of the fractional quantum spin Hall effect in moiré MoTe2

Failure of Nielsen-Ninomiya Theorem and Fragile Topology in Two-Dimensional Systems with Space-Time Inversion Symmetry: Application to Twisted Bilayer Graphene at Magic Angle

Band Topology and Linking Structure of Nodal Line Semimetals with Z2 Monopole Charges