10 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…
Specific heat and susceptibility of S=1/2 antiferromagnets on square, triangular, and kagome lattices
Chisa Hotta
We study the temperature dependence of the thermodynamic properties of spin-1/2 antiferromagnets on two-dimensional lattices. Our analysis employs the sine-square deformation (SSD)…
Effective spin model with anisotropic exchange interactions for the spin-orbit coupled Hubbard model at half-filling
Ryo Makuta, Chisa Hotta
Spin-orbit coupling (SOC) in noncentrosymmetric materials is the source of incommensurate magnetic structures. In semiconductors, it drives the Rashba spin splitting and spin momen…
Environment-matrix-product operator for boundary-free large-scale quantum many-body simulations
Souta Shimozono, Chisa Hotta
We propose an alternative to the infinite density-matrix renormalization approach for accessing quantum many-body states within a finite-size calculation that faithfully mimics the…
Spin amplitude wave due to dipole-quadrupole hybridization in spin-1 pyrochlore magnets
Hiroki Nakai, Chisa Hotta
We explore the quantum pseudospin-1 pyrochlore magnet featuring Fe-based spinel oxides that addresses the formation of amplitude-modulated spin-density waves. We propose tha…
Scan calculation of the density of states: real space cluster perturbation theory applied to inhomogeneous Hubbard model in one dimension
Kaito Matsuki, Chisa Hotta, Kenichi Asano
We present the spectral analysis of a one-dimensional Hubbard model with a parabolic potential, using a real-space cluster perturbation theory (rCPT) designed to study spatially in…