65 citations · 495 across the 22 of their papers we have counts for
22 papers
Nontrivial three-sublattice magnetization in the easy-axis spin-1/2 XXZ antiferromagnet on the triangular lattice
Masahiro Kadosawa, Masaaki Nakamura, Yukinori Ohta +1
We investigate the ground-state magnetic structure of the spin- XXZ antiferromagnet on the triangular lattice in the easy-axis regime using the density-matrix renormalization…
Order, criticality and excitations in the extended Falicov-Kimball model
S. Ejima, T. Kaneko, Y. Ohta +1
Using exact numerical techniques we investigate the nature of excitonic (electron-hole) bound states and the development of exciton coherence in the one-dimensional half-filled ext…
Antiferromagnetic topological insulator state in the correlated Bernevig-Hughes-Zhang model
S. Miyakoshi, Y. Ohta
We study the effects of electron correlations on the topological phase transition in the Bernevig-Hughes-Zhang model using the variational cluster approach where the short-range sp…
Magnetic properties and Mott transition in the square-lattice Hubbard model with frustration
A. Yamada, K. Seki, R. Eder +1
The magnetic properties and Mott transition of the Hubbard model on the square lattice with frustration are studied at half-filling and zero temperature by the variational cluster…
Mott transition and ferrimagnetism in the Hubbard model on the anisotropic kagomé lattice
A. Yamada, K. Seki, R. Eder +1
Mott transition and ferrimagnetism are studied in the Hubbard model on the anisotropic kagomé lattice using the variational cluster approximation and the phase diagram at zero temp…
Theory of the waterfall phenomenon in cuprate superconductors
D. Katagiri, K. Seki, R. Eder +1
Based on exact diagonalization and variational cluster approximation calculations we study the relationship between charge transfer models and the corresponding single band Hubbard…