3 papers
cond-mat.str-el2026
Magnetic fluctuations driven by quantum geometry
Makoto Shimizu, Chang-guen Oh, Youichi Yanase
Using quantum distance, magnetic susceptibility in the noninteracting limit can be rigorously split into two contributions: one arises solely from band dispersion while the other s…
cond-mat.supr-con2025
Third-harmonic generation in superconductors: Role of quantum geometry in the competition between Higgs mode and quasiparticles
Chang-geun Oh, Haruki Watanabe, Naoto Tsuji
Collective modes in superconductors, such as the Higgs mode, offer deep insights into the nature of condensates. Third-harmonic generation (THG) is a primary tool for probing the H…
physics.optics2025
Color and Transparency from Quantum Geometry
Chang-geun Oh, Sun-Woo Kim
The optical properties of solids are governed not only by their energy band dispersions but also by the quantum geometry of Bloch states. While the role of energy bands in determin…