3 papers
cond-mat.str-el2026
Two distinct gap structures in the mid-infrared optical conductivity of the Hubbard model
Dongwook Kim, Karsten Held
Mid-infrared (MIR) optical conductivities in cuprate superconductors show universal features. In this study, we demonstrate that these originate from two distinct gaps: the pseudog…
cond-mat.str-el2026
Universal Signature of Hundness and Its Quantification
Dongwook Kim, Ina Park, Bo Gyu Jang +1
Hund's coupling induces fundamentally different correlation effects from Hubbard . This leads to a violation of the Brinkman--Rice scenario and the emergence of a Janus-face…
cond-mat.mtrl-sci2026
Correlation-driven tunability of altermagnetism in RuO
Ina Park, Dongwook Kim, Inho Lee +3
RuO has been regarded as a prototypical candidate for metallic altermagnet, offering a potential platform for high-speed and high-efficiency spintronics. However, the magnetic…