5 papers
Theoretical study on ambient pressure superconductivity in LaNiO thin films : structural analysis, model construction, and robustness of -wave pairing
Kensei Ushio, Shu Kamiyama, Yuto Hoshi +4
We theoretically study ambient pressure superconductivity in thin films of LaNiO. We construct model Hamiltonians adopting the crystal structure theoretically determine…
Nonlinear phononics in LaFeAsO: Optical control of the crystal structure toward possible enhancement of superconductivity
Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki +1
Nonlinear phononics provides a route to control crystal structures through light-induced phonon excitation. In this study, we apply nonlinear phononics to an iron-based superconduc…
Optical control of the crystal structure in the bilayer nickelate superconductor La3Ni2O7 via nonlinear phononics
Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki +1
Superconductivity in the bilayer nickelate LaNiO occurs when the interlayer Ni-O-Ni bond angle becomes straight under pressure, suggesting a strong relationship between…
Theoretical proposal of superconductivity in hole-doped reduced bilayer nickelate La3Ni2O6: a manifestation of orbital-space bilayer model with incipient bands
Shu Kamiyama, Reo Kohno, Yuto Hoshi +4
A correspondence exists between the multi-orbital Hubbard model and the bilayer Hubbard model, in which superconductivity is optimized in an incipient-band regime in both cases. In…
Electronic band structure, phonon dispersion, and magnetic triple-q state in GdGaI
Tatsuya Kaneko, Ryota Mizuno, Shu Kamiyama +2
We theoretically investigate the physical properties of the magnetic van der Waals material GdGaI. Using first-principles calculations, we compute the phonon dispersion of GdGaI an…