95 citations · 323 across the 13 of their papers we have counts for
13 papers
Quantum Oscillation Signatures of Monopole Charge in Nodal-Ring Semimetals
Aravind Karthigeyan, Yoonseok Hwang, Bohm-Jung Yang +1
Topological semimetals host band nodes characterized by quantized invariants that can appear in bulk responses, yet some invariants remain hidden from standard probes. In particula…
Axion Topology in Photonic Crystal Domain Walls
Chiara Devescovi, Antonio Morales-Pérez, Yoonseok Hwang +6
Axion insulators are 3D magnetic higher-order topological insulators protected by inversion-symmetry that exhibit hinge-localized chiral channels and induce quantized topological m…
Transversality-Enforced Tight-Binding Models for 3D Photonic Crystals aided by Topological Quantum Chemistry
Antonio Morales-Pérez, Chiara Devescovi, Yoonseok Hwang +5
Tight-binding models can accurately replicate the band structure and topology of crystalline systems. They have been widely used in solid-state physics due to their versatility and…
Spin-momentum Locking and Topological Vector Charge Response with Conserved Spin
Yoonseok Hwang, Penghao Zhu, Taylor L. Hughes
Spin-momentum locking plays a fundamental role in spintronics and, more broadly, is an important concept in condensed matter physics. In 2D and 3D, spin-momentum locking typically…
Magnetic wallpaper Dirac fermions and topological magnetic Dirac insulators
Yoonseok Hwang, Yuting Qian, Junha Kang +4
Topological crystalline insulators (TCIs) can host anomalous surface states which inherits the characteristics of crystalline symmetry that protects the bulk topology. Especially,…
Unsupervised learning of topological phase diagram using topological data analysis
Sungjoon Park, Yoonseok Hwang, Bohm-Jung Yang
Topology and machine learning are two actively researched topics not only in condensed matter physics, but also in data science. Here, we propose the use of topological data analys…
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…
Topological acoustic triple point
Sungjoon Park, Yoonseok Hwang, Hong Chul Choi +1
Acoustic phonon in a crystalline solid is a well-known and ubiquitous example of elementary excitation with a triple degeneracy in the band structure. Because of the Nambu-Goldston…
Geometric characterization of anomalous Landau levels of isolated flat bands
Yoonseok Hwang, Jun-Won Rhim, Bohm-Jung Yang
According to the Onsager's semiclassical quantization rule, the Landau levels of a band are bounded by its upper and lower band edges at zero magnetic field. However, there are two…
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…
M5-branes, orientifolds, and S-duality
Yoonseok Hwang, Joonho Kim, Seok Kim
We study the instanton partition functions of 5d maximal super Yang-Mills theories with all classical gauge groups. They are computed from the ADHM quantum mechanics of the D0-D4-O…