205 citations · 1.2k across the 42 of their papers we have counts for
16 papers · 1 filter
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…
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…
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…
Thermoelectric Transport Driven by Quantum Distance
Chang-geun Oh, Kun Woo Kim, Jun-Won Rhim
The geometric characteristics of Bloch wave functions play a crucial role in electronic transport properties. We show that the thermoelectric performance of materials is governed b…
Revisiting the magnetic responses of bilayer graphene from the perspective of the quantum distance
Chang-geun Oh, Jun-Won Rhim, Bohm-Jung Yang
We study the influence of the quantum geometry on the magnetic responses of quadratic band crossing semimetals. More explicitly, we examine the Landau levels, quantum Hall effect,…
Magneto-nonlinear Hall effect in time-reversal breaking system
Anwei Zhang, Jun-Won Rhim
Magneto-nonlinear Hall effect is known to be intrinsic and requires time-reversal symmetry. Here we show that a new type of magneto-nonlinear Hall effect can occur in the time-reve…