4 papers
Superconductivity-enhanced phonon angular momentum
Natsuki Okada, Philipp Werner, Shintaro Hoshino
We theoretically investigate the properties of phonon angular momentum in the superconducting state, using fulleride compounds in an external magnetic field as a model system. The…
Symmetry-breaking perturbations in the Jahn-Teller-Hubbard model
Natsuki Okada, Tatsuya Miki, Yusuke Nomura +2
We study the effect of symmetry-breaking perturbations in the multiorbital Hubbard model coupled to anisotropic Jahn-Teller phonons, which is relevant for the description of fuller…
Low-rank quantics tensor train representations of Feynman diagrams for multiorbital electron-phonon models
Hirone Ishida, Natsuki Okada, Shintaro Hoshino +1
Feynman diagrams are an essential tool for simulating strongly correlated electron systems. However, stochastic quantum Monte Carlo sampling suffers from the sign problem, particul…
Weak coupling approach to magnetic and orbital susceptibilities for superconducting states in multiorbital electron-phonon coupled model
Natsuki Okada, Tatsuya Miki, Shintaro Hoshino
Alkali-doped fullerides are molecular-based superconductors with multiple active orbitals. In this paper, using the Eliashberg theory with the retardation effect of Jahn-Teller pho…