4 papers
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…
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…
Universal Optical Conductivity from Quantum Geometry in Quadratic Band-Touching Semimetals
Chang-geun Oh, Sun-Woo Kim, Kun Woo Kim +2
Exploring the quantum geometric properties of solids beyond their topological aspects has become a key focus in current solid-state physics research. We derive the geometric formul…
Origin of competing charge density waves in kagome metal ScVSn
Kang Wang, Siyu Chen, Sun-Woo Kim +1
Understanding competing charge density wave (CDW) orders in the bilayer kagome metal ScVSn remains challenging. Experimentally, upon cooling, short-range order with wave ve…