5 papers
Theory of clusterization in orbitally degenerate transition-metal compounds driven by lattice instabilities
Soshun Ozaki, Kota Mitsumoto, Chisa Hotta
We derive an effective orbital-lattice model with quantum degrees of freedom for transition-metal compounds, providing a microscopic understanding of cluster formation driven…
Orbital-Zeeman cross correlation in - and -wave altermagnets
Tomonari Mizoguchi, Soshun Ozaki
Altermagnets are a novel class of magnets that exhibit a large spin splitting but the total magnetic moment is vanishing. This unconventional spin splitting gives rise to various c…
Orbital paramagnetism without density of states enhancement in nodal-line semimetal ZrSiS
Soshun Ozaki, Hiroyasu Matsuura, Ikuma Tateishi +2
Unconventional orbital paramagnetism without enhanced density of states was recently discovered in the nodal-line semimetal ZrSiS. We propose a novel interband mechanism, linked to…
Orbital Magnetism in Honeycomb Ladder
Tomonari Mizoguchi, Soshun Ozaki, Hiroyasu Matsuura
We investigate the orbital magnetic susceptibility of the tight-binding model for the honeycomb ladder with the additional vertical hopping. Despite being one-dimensional, the magn…
Disorder-free Sachdev-Ye-Kitaev models: Integrability and a precursor of chaos
Soshun Ozaki, Hosho Katsura
We introduce two disorder-free variants of the Sachdev-Ye-Kitaev (SYK) model, demonstrate their integrability, and study their static and dynamical properties. Unlike diagrammatic…