191 citations · 1.4k across the 36 of their papers we have counts for
4 papers · 1 filter
Microscopic quantum interference in excitonic condensation of TaNiSe
Koudai Sugimoto, Tatsuya Kaneko, Yukinori Ohta
The microscopic quantum interference associated with excitonic condensation in TaNiSe is studied in the BCS-type mean-field approximation. We show that in ultrasonic attenu…
Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings
Tatsuya Kaneko, Bernd Zenker, Holger Fehske +1
We analyze the stability of excitonic ground states in the two-band Hubbard model with additional electron-phonon and Hund's rule couplings using a combination of mean-field and va…
Phase Diagram of the Frustrated Square-Lattice Hubbard Model: Variational Cluster Approach
Kazuma Misumi, Tatsuya Kaneko, Yukinori Ohta
The variational cluster approximation is used to study the frustrated Hubbard model at half filling defined on the two-dimensional square lattice with anisotropic next-nearest-neig…
Metal-Insulator Transition of Dirac Fermions: Variational Cluster Study
Masaki Ebato, Tatsuya Kaneko, Yukinori Ohta
A comparative study is made on the metal-insulator transition of Dirac fermions in the honeycomb and π-flux Hubbard models at half filling by means of the variational cluster appro…