474 citations · 2.6k across the 51 of their papers we have counts for
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A microscopic design rule for spin supersolids in triangular-lattice magnets
Ryota Ono, Jun'ichi Ieda, Michiyasu Mori +1
Spin supersolids emerge as a central topic in frustrated magnetism, motivating the search for realization in quantum materials. To this end, we study the origin of exchange anisotr…
Magnetic Phase Diagram of Frustrated Spin Ladder
T. Sugimoto, M. Mori, T. Tohyama +1
Frustrated spin ladders show magnetization plateaux depending on the rung-exchange interaction and frustration defined by the ratio of first and second neighbor exchange interactio…
Temperature Dependence of Thermopower in Strongly Correlated Multiorbital Systems
M. Sekino, S. Okamoto, W. Koshibae +2
Temperature dependence of thermopower in the multiorbital Hubbard model is studied by using the dynamical mean-field theory with the non-crossing approximation impurity solver. It…
Quantum Dynamics of a Driven Correlated System Coupled to Phonons
Lev Vidmar, Janez Bonca, Takami Tohyama +1
Nonequilibrium interplay between charge, spin and lattice degrees of freedom on a square lattice is studied for a single charge carrier doped in the t-J-Holstein model. In the pres…
Non-monotonic temperature dependence of thermopower in strongly correlated electron systems
M. Matsuo, S. Okamoto, W. Koshibae +2
We examine the temperature dependence of thermopower in the single band Hubbard model using dynamical mean-field theory. The strong Coulomb interaction brings about the coherent-to…
Thermoelectric response in the incoherent transport region near Mott transition: the case study of La1-xSrxVO3
M. Uchida, K. Oishi, M. Matsuo +7
We report a systematic investigation on the high-temperature thermoelectric response in a typical filling-control Mott transition system La1-xSrxVO3. In the vicinity of the Mott tr…
Bipolaron in the t-J model coupled to longitudinal and transverse quantum lattice vibrations
Lev Vidmar, Janez Bonca, Sadamichi Maekawa +1
We explore the influence of two different polarizations of quantum oxygen vibrations on the spacial symmetry of the bound magnetic bipolaron in the context of the t-J model by usin…
Optical conductivity in the t-J-Holstein Model
L. Vidmar, J. Bonca, S. Maekawa
Using recently developed numerical method we compute charge stiffness and optical conductivity of the t-J model coupled to optical phonons. Coherent hole motion is most strongly in…
Coexistence of superconductivity and antiferromagnetism in self-doped bilayer t-t'-J model
J. Y. Gan, M. Mori, T. K. Lee +1
A self-doped bilayer t-t'-J model of an electron- and a hole-doped planes is studied by the slave-boson mean-field theory. A hopping integral between the differently doped planes,…
Numerical approach to low-doping regime of the t-J model
J. Bonca, S. Maekawa, T. Tohyama
We develop an efficient numerical method for the description of a single-hole motion in the antiferromagnetic background. The method is free of finite-size effects and allows calcu…
Effect of Kondo resonance on optical third harmonic generation
S. A. Jafari, T. Tohyama, S. Maekawa
We use the method of dynamical mean field thoery, to study the effect of Kondo resonance on optical third harmonic generation (THG) spectra of strongly correlated systems across th…
Dynamical mean field theory of optical third harmonic generation
S. A. Jafari, T. Tohyama, S. Maekawa
We formulate the third harmonic generation (THG) within the dynamical mean field theory (DMFT) approximation of the Hubbard model. In the limit of large dimensions, where DMFT beco…
Anomalous temperature dependence of the single-particle spectrum in the organic conductor TTF-TCNQ
N. Bulut, H. Matsueda, T. Tohyama +1
The angle-resolved photoemission spectrum of the organic conductor TTF-TCNQ exhibits an unusual transfer of spectral weight over a wide energy range for temperatures 60K<T<260K. In…
Momentum Dependence of Charge Excitations in the Electron-Doped Superconductor Nd1.85Ce0.15CuO4: a RIXS Study
K. Ishii, K. Tsutsui, Y. Endoh +9
We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-Tc superconductor Nd1.85Ce0.15CuO4. The intraband and interband excita…
Thermodynamic and thermoelectric properties of high-temperature cuprate superconductors in the stripe phase
T. Tohyama, S. Maekawa, P. Prelovsek
We examine the thermodynamic and thermoelectric properties in the stripe phase of high-Tc cuprates, by using the finite-temperature Lanczos technique for the t-J model with a poten…
Magnetic Ordering, Orbital Ordering and Resonant X-ray Scattering in Perovskite Titanates
S. Ishihara, T. Hatakeyama, S. Maekawa
The effective Hamiltonian for perovskite titanates is derived by taking into account the three-fold degeneracy of orbitals and the strong electron-electron interactions. T…
A Jordan-Wigner transformation for the and Hubbard models with holes
S. E. Barnes, S. Maekawa
A Jordan-Wigner (JW) transformation for the and Hubbard models is described. Introduced are holon and doublon particles for hole and double occupied sites. There is only a si…
Theory of Raman Scattering from Orbital Excitations in Manganese Oxides
S. Okamoto, S. Ishihara, S. Maekawa
We present a theory of the Raman scattering from the orbital wave excitations in manganese oxides. Two excitation processes of the Raman scattering are proposed. The Raman scatteri…
Electronic Structure of Mott Insulators Studied by Inelastic X-ray Scattering
M. Z. Hasan, E. D. Isaacs, Z-X. Shen +4
The electronic structure of Mott insulators continues to be a major unsolved problem in physics despite more than half-century of intense research efforts. Well-developed momentum-…
Vanishing Hall Constant in the Stripe Phase of Cuprates
P. Prelovsek, T. Tohyama, S. Maekawa
The Hall constant R_H is considered for the stripe structures. In order to explain the vanishing of R_H in LNSCO at x = 1/8, we use the relation of R_H to the Drude weight D as wel…
Resonant Inelastic X-ray Scattering from Charge and Orbital Excitations in Manganites
H. Kondo, S. Ishihara, S. Maekawa
We present a theory of the resonant inelastic x-ray scattering (RIXS) to study electronic excitations in orbital ordered manganites. The charge and orbital excitations of the Mn 3d…
Temperature Dependence of Spin Correlation and Charge Dynamics in the Stripe Phase of High-T_c Superconductors
Y. Shibata, T. Tohyama, S. Maekawa
We examine the temperature dependence of the electronic states in the stripe phase of high-Tc cuprates by using the t-J model with a potential that stabilizes vertical charge strip…
Orbital liquid in three dimensional Mott insulator:
G. Khaliullin, S. Maekawa
We present a theory of spin and orbital states in Mott insulator . The spin-orbital superexchange interaction between ions in cubic crystal suffers from a pa…
Angle-resolved photoemission in high Tc cuprates from theoretical viewpoints
T. Tohyama, S. Maekawa
The angle-resolved photoemission (ARPES) technique has been developed rapidly over the last decay, accompanied by the improvement of energy and momentum resolutions. This technique…