Publications (83)
Low energy excitations of the t-J model in 1D and 2D
R. Eder, Y. C. Chen, H. Q. Lin +3
Ab initio electronic structure calculation of hollandite vanadate K$_2$V$_8$O$_{16}$
M. Sakamaki, S. Horiuchi, T. Konishi +1
Important Roles of Te 5p and Ir 5d Spin-orbit Interactions on the Multi-band Electronic Structure of Triangular Lattice Superconductor Ir1-xPtxTe2
D. Ootsuki, T. Toriyama, M. Kobayashi +15
Inverse photoemission in strongly correlated electron systems
R. Eder, Y. Ohta
Weak quasistatic magnetism in the frustrated Kondo lattice Pr_2Ir_2O_7
D. E. MacLaughlin, Y. Ohta, Y. Machida +6
Cellular Automata and Ultra-Discrete Painlevé Equations
B. Grammaticos, Y. Ohta, A. Ramani +2
Singularity confinement and algebraic entropy: the case of the discrete Painlevé equations
Y. Ohta, K. M. Tamizhmani, B. Grammaticos +1
ARPES spectra of the stripe phase in the 2D t-J model
R. Eder, Y. Ohta
Exact-diagonalization study of exciton condensation in electron bilayers
T. Kaneko, S. Ejima, H. Fehske +1
On Discretizations of the Vector Nonlinear Schrodinger Equation
M. J. Ablowitz, Y. Ohta, A. D. Trubatch
Bogoliubov quasiparticle spectra of the effective d-wave model for cuprate superconductivity
Y. Ohta, M. Yamaguchi, R. Eder
A BCS-BEC crossover in the extended Falicov-Kimball model: Variational cluster approach
K. Seki, R. Eder, Y. Ohta
Antiferromagnetism versus Kondo screening in the two-dimensional periodic Anderson model at half filling: Variational cluster approach
S. Horiuchi, S. Kudo, T. Shirakawa +1
Ground-state phase diagram of the one-dimensional dimerized t-J model at quarter filling
S. Nishimoto, Y. Ohta
Superconductivity in a model of two Hubbard chains coupled with ferromagnetic exchange interaction
T. Shirakawa, S. Nishimoto, Y. Ohta
Landau mapping and Fermi liquid parameters of the 2D t-J model
S. Nishimoto, Y. Ohta, R. Eder
Orthorhombic-to-Monoclinic Phase Transition of Ta2NiSe5 Induced by the Bose-Einstein Condensation of Excitons
T. Kaneko, T. Toriyama, T. Konishi +1
Charge and Orbital Ordering in the Triangular-Lattice t_{2g}-Orbital System in One Dimension: A Possible Ground State of Bi_xV_8O_{16}
Y. Shibata, Y. Ohta
Quasideterminant solutions of a non-Abelian Hirota-Miwa equation
C. R. Gilson, J. J. C. Nimmo, Y. Ohta
K$_2$Cr$_8$O$_{16}$ predicted as a half-metallic ferromagnet: Scenario for a metal-insulator transition
M. Sakamaki, T. Konishi, Y. Ohta
Point configurations, Cremona transformations and the elliptic difference Painlevé equation
K. Kajiwara, T. Masuda, M. Noumi +2
The 1D t-J model with next-nearest neighbor hopping - breakdown of the Luttinger liquid?
R. Eder, Y. Ohta
Spin and charge dynamics of the t-J model at intermediate electron densities: absence of spin-charge separation
R. Eder, Y. Ohta
Spin-triplet f-wave pairing due to three-site cyclic-exchange ferromagnetic interactions
S. Nishimoto, Y. Ohta
Theoretical Study on Superconductivity in Boron-Doped Diamond
T. Shirakawa, S. Horiuchi, Y. Ohta +1
Bilinear Structure and Exact Solutions of the Discrete Painlevé I Equation
Y. Ohta, K. Kajiwara, J. Satsuma
Magnetic transition, long-range order, and moment fluctuations in the pyrochlore iridate Eu2Ir2O7
Songrui Zhao. J. M. Mackie, D. E. MacLaughlin, O. O. Bernal +3
Photoemission spectra of the t-J model in 1 and 2D: similarities and differences
R. Eder, Y. Ohta
Excitation Spectra of the Negative-U Hubbard Model: A Small-Cluster Study
Y. Ohta, A. Nakauchi, R. Eder +2
Phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
S. Nishimoto, K. Sano, Y. Ohta
Excitonic Bose-Einstein condensation in Ta2NiSe5 above room temperature
K. Seki, Y. Wakisaka, T. Kaneko +12
Blending two discrete integrability criteria: singularity confinement and algebraic entropy
S. Lafortune, A. Ramani, B. Grammaticos +2
Heavy Quasiparticles in the Anderson Lattice Model
K. Tsutsui, Y. Ohta, R. Eder +3
Exact Diagonalization Study of Strongly Correlated Electron Models: Hole pockets and shadow bands in the doped t-J model
Y. Ohta, R. Eder
Strong Coupling Nature of the Excitonic Insulator State in Ta$_2$NiSe$_5$
K. Sugimoto, S. Nishimoto, T. Kaneko +1
Quantum phase transitions in the honeycomb-lattice Hubbard model
K. Seki, Y. Ohta
Bogoliubov Quasiparticle Excitations in the Two-Dimensional t-J Model
Y. Ohta, T. Shimozato, R. Eder +1
Effective Heisenberg-Model Description of the Coupled Spin-Pseudospin Model for Quarter-Filled Ladders
T. Nakaegawa, Y. Ohta
Antiferromagnetic topological insulator state in the correlated Bernevig-Hughes-Zhang model
S. Miyakoshi, Y. Ohta
Novel Electronic Structures of Ru-Pnictides Ru$Pn$ ($Pn$ = P, As, Sb)
H. Goto, T. Toriyama, T. Konishi +1
Theoretical study of the electronic states of hollandite vanadate K$_2$V$_8$O$_{16}$
S. Horiuchi, T. Shirakawa, Y. Ohta
Spin bags in the doped t-J model
R. Eder, Y. Ohta
Ferromagnetic Peierls insulator state in $\mathit{A}$Mg$_4$Mn$_6$O$_{15}$ ($\mathit{A}$ = K, Rb, Cs)
T. Yamaguchi, K. Sugimoto, Y. Ohta +2
Self-energy and Fermi surface of the 2-dimensional Hubbard model
R. Eder, K. Seki, Y. Ohta
Double Exchange Ferromagnetism in the Peierls Insulator State
S. Nishimoto, Y. Ohta
Reversed Crystal-Field Splitting and Spin-Orbital Ordering in $α$-Sr$_2$CrO$_4$
T. Ishikawa, T. Toriyama, T. Konishi +2
Theory of the Lightly Doped Mott Insulator
R. Eder, P. Wrobel, Y. Ohta
Spin and density excitations in the triangular-lattice $t$-$J$ model with multiple-spin exchange interactions: $^3$He on graphite
K. Seki, T. Shirakawa, Y. Ohta
From Discrete to Continuous Painlevé Equations: A Bilinear Approach
Y. Ohta, A. Ramani, B. Grammaticos +1
The space of initial conditions for linearisable mappings
T. Takenawa, M. Eguchi, B. Grammaticos +3
Linearisable Mappings and the Low-Growth Criterion
A. Ramani, B. Grammaticos, S. Lafortune +1
Dynamical domain walls and spin-Peierls order in doped antiferromagnets: evidence from exact diagonalization of small clusters
R. Eder, Y. Ohta
Hole pockets in the t-J model
R. Eder, Y. Ohta
On Discrete Painleve Equations Associated with the Lattice KdV Systems and the Painleve VI Equation
F. W. Nijhoff, A. Ramani, B. Grammaticos +1
Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O16
T. Toriyama, A. Nakao, Y. Yamaki +10
Te 5p orbitals bring three-dimensional electronic structure to two-dimensional Ir0.95Pt0.05Te2
D. Ootsuki, T. Toriyama, M. Kobayashi +13
Spin gap of the three-leg S=3/2 Heisenberg tube
S. Nishimoto, Y. Fuji, Y. Ohta
Spin dynamics of the doped t-J model
R. Eder, Y. Ohta
Optical conductivity of strongly correlated electron systems
R. Eder, P. Wrobel, Y. Ohta
Ground state properties and dynamics of the bilayer t-J model
R. Eder, Y. Ohta, S. Maekawa
A unified description of the asymmetric q-P_{v} and d-P_{iv} equations and their Schlesinger transformations
B. Grammaticos, A. Ramani, Y. Ohta
Optical conductivity in the CuO double chains of PrBa_2Cu_4O_8: Consequences of charge fluctuation
R. Amasaki, Y. Shibata, Y. Ohta
Optical Conductivity of the Trellis-Lattice t-J Model: Charge Fluctuations in NaV_2O_5
S. Nishimoto, Y. Ohta
The Sasa-Satsuma higher order nonlinear Schrodinger equation and its bilinearization and multi-soliton solutions
C. Gilson, J. Hietarinta, J. Nimmo +1
Doping dependent quasiparticle band structure in cuprate superconductors
R. Eder, Y. Ohta, G. A. Sawatzky
Mesonic and nonmesonic weak decay widths of medium-heavy lambda hypernuclei
Y. Sato, S. Ajimura, K. Aoki +16
Separated Spin and Charge Excitations and their Coupling in the Spin-Pseudospin Model for Quarter-Filled Ladders
Y. Ohta, T. Nakaegawa, S. Ejima
Critical Dimerization Strength of the Quarter-Filled t-J Model
S. Nishimoto, Y. Ohta
A Model Study of the Low-Energy Charge Dynamics of NaV_2O_5
S. Nishimoto, Y. Ohta
Order, criticality and excitations in the extended Falicov-Kimball model
S. Ejima, T. Kaneko, Y. Ohta +1
Validity of the rigid band picture for the t-J model
R. Eder, Y. Ohta, T. Shimozato
Spin and charge excitations in the anisotropic Hubbard ladder at quarter filling with charge-ordering instability
Y. Ohta, T. Nakaegawa, S. Ejima
On Integrability and Chaos in Discrete Systems
M. J. Ablowitz, Y. Ohta, A. D. Trubatch
Ring Exchange Mechanism for Triplet Superconductivity in a Two-Chain Hubbard Model: Possible Relevance to Bechgaard Salts
Y. Ohta, S. Nishimoto, T. Shirakawa +1
Charge and spin excitation spectra in the one-dimensional Hubbard model with next-nearest-neighbor hopping
S. Nishimoto, T. Shirakawa, Y. Ohta
Magnetic properties and Mott transition in the square-lattice Hubbard model with frustration
A. Yamada, K. Seki, R. Eder +1
Mott transition and ferrimagnetism in the Hubbard model on the anisotropic kagomé lattice
A. Yamada, K. Seki, R. Eder +1
Large entropy change derived from the orbitally assisted three-centered two-electron Ï bond formation in a metallic Li0.33VS2
N. Katayama, S. Tamura, T. Yamaguchi +8
Charge Ordering in the One-Dimensional Extended Hubbard Model: Implication to the TMTTF Family of Organic Conductors
Y. Shibata, S. Nishimoto, Y. Ohta
Theory of the waterfall phenomenon in cuprate superconductors
D. Katagiri, K. Seki, R. Eder +1
Coexistence of distinct charge fluctuations in $θ$-(BEDT-TTF)$_2$X
S. Nishimoto, M. Shingai, Y. Ohta
NaV_2O_5 as an Anisotropic t-J Ladder at Quarter Filling
S. Nishimoto, Y. Ohta
Anomalous Spin and Charge Dynamics of the 2D t-J Model at low doping
R. Eder, Y. Ohta, S. Maekawa