38 citations · 38 across the 1 of their papers we have counts for
4 papers
General construction of flat bands with and without band crossings based on wave function singularity
Yoonseok Hwang, Jun-Won Rhim, Bohm-Jung Yang
In this work, we develop a systematic method of constructing flat-band models with and without band crossings. Our construction scheme utilizes the symmetry and spatial shape of a…
Flat bands with band crossings enforced by symmetry representation
Yoonseok Hwang, Jun-Won Rhim, Bohm-Jung Yang
Flat bands have band crossing points with other dispersive bands in many systems including the canonical flat band models in the Lieb and kagome lattices. Here we show that some of…
Wave-function geometry of band crossing points in two-dimensions
Yoonseok Hwang, Junseo Jung, Jun-Won Rhim +1
Geometry of the wave function is a central pillar of modern solid state physics. In this work, we unveil the wave-function geometry of two-dimensional semimetals with band crossing…
Fragile Topology Protected by Inversion Symmetry: Diagnosis, Bulk-Boundary Correspondence, and Wilson Loop
Yoonseok Hwang, Junyeong Ahn, Bohm-Jung Yang
We study the bulk and boundary properties of fragile topological insulators (TIs) protected by inversion symmetry, mostly focusing on the class A of the Altland-Zirnbauer classific…