205 citations · 1.2k across the 42 of their papers we have counts for
44 papers
Topological Transverse Transport without a Gap in Critical Topological Flat Bands
Chang-geun Oh, Tomoki Ozawa, Jun-Won Rhim
Quantized Hall transport is traditionally anchored to a bulk spectral gap, which isolates the occupied subspace and exponentially suppresses thermal deviations. Recently discovered…
Classification of Non-Hermitian Flat Bands
Chang-geun Oh, Jun-Won Rhim
Exact flat bands provide a versatile setting for correlated and topological phenomena, yet their properties are controlled not only by their dispersion but also by the structure of…
Enhancement of exciton radius near a band-gap closing through quantum geometry
Jin-Hyung Choi, Sang-Hoon Han, Young-Kwon Han +3
Exciton engineering traditionally focuses on modifying semiclassical material properties, such as the effective mass and dielectric screening, while largely overlooking the quantum…
Ultrafast Current Switching from Quantum Geometry in Semimetals
Youngjae Kim, Sejoong Kim, Jun-Won Rhim
Technological progress towards next-generation electronics critically relies on achieving faster switching with reduced energy consumption. Because device operation speeds are fund…
Klein tunneling in quantum geometric semimetals
Sang-Hoon Han, Jun-Won Rhim, Chang-geun Oh
Klein tunneling stands as a fundamental probe of relativistic quantum transport in two-dimensional materials. We investigate this phenomenon in quadratic band-touching systems, whe…
Topological Protection by Local Support Symmetry and Destructive Interference
Jun-Won Rhim, Jaeuk Seo, Seongjun Mo +3
Conventionally, symmetry-protected topological phases and band crossings are protected by global symmetries acting on the entire system. Here, we show that symmetries preserved onl…