7 papers
Quantum geometry and RKKY in flat bands
Chang-geun Oh, Makoto Shimizu, Youichi Yanase +1
Flat conduction bands quench the group velocity and thus challenge conventional, dispersion-driven pictures of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, where localized…
Magnetic fluctuations and anisotropy in UTe2: a multi-orbital study based on GGA+U and RPA
Makoto Shimizu, Youichi Yanase
Pressure-induced changes in the magnetic and superconducting properties of a spin-triplet superconductor candidate UTe have attracted considerable interest, underscoring the ne…
Surface charge density wave in UTe2
Pablo GarcÃa Talavera, Pablo García Talavera, Miguel Ãgueda Velasco +16
The spatially uniform electronic density characteristic of a metal can become unstable at low temperatures, leading to the formation of charge density waves (CDWs). These CDWs, obs…
Magnetic fluctuations driven by quantum geometry
Makoto Shimizu, Chang-guen Oh, Youichi Yanase
Using quantum distance, magnetic susceptibility in the non-interacting limit can be rigorously split into two contributions: one arising solely from band dispersion, while the othe…
Electronic structure of UTe under pressure
Makoto Shimizu, Youichi Yanase
A heavy-fermion paramagnet UTe has been a strong candidate for a spin-triplet superconductor. Experiments on UTe under pressure have been vigorously conducted, and rich pha…
Multilayer Crystal Field states from locally broken centrosymmetry
Owen Moulding, Makoto Shimizu, Amit Pawbake +9
Local charge, spin, or orbital degrees of freedom with intersite interactions are oftentimes sufficient to construct most quantum orders. This is conventionally true for f-electron…