強相関電子系理論研究室（太田研究室）千葉大学大学院理学研究科
千葉大学理学部

学術論文（主要なもののみ）

2023

  1. "One-dimensional projection of two-dimensional systems using spiral boundary conditions"
    M. Kadosawa, M. Nakamura, Y. Ohta, and S. Nishimoto
    Phys. Rev. B 107, L081104 (2023)
  2. "Study of Staggered Magnetization in the Spin-S Square-Lattice Heisenberg Model Using Spiral Boundary Conditions"
    M. Kadosawa, M. Nakamura, Y. Ohta, and S. Nishimoto
    J. Phys. Soc. Jpn. 92, 023701 (2023)

2022

  1. "Collective mode excitations and simulated L-edge resonant inelastic x-ray scattering spectra in antiferromagnetic Ca2RuO4"
    S. Yamamoto, Y. Ohta, and K. Sugimoto
    Phys. Rev. B 106, 045136/1-9 (2022)
  2. "Excitonic effects on high-harmonic generation in Mott insulators"
    M. Udono, K. Sugimoto, T. Kaneko, and Y. Ohta
    Phys. Rev. B 105, L241108/1-5 (2022)
  3. "Charge-ordered state satisfying the Anderson condition in LiRh2O4 arising from local dimer order"
    M. Shiomi, K. Kojima, N. Katayama, S. Maeda, J. A. Schneeloch, S. Yamamoto, K. Sugimoto, Y. Ohta, D. Louca, Y. Okamoto, and H. Sawa
    Phys. Rev. B 105, L041103/1-5 (2022)

2021

  1. "Spin-S impurities with XXZ anisotropy in a spin-1/2 Heisenberg chain"
    A. Singhania, M. Kadosawa, Y. Ohta, S. Kumar, and S. Nishimoto
    Phys. Rev. B 104, 224407/1-16 (2021)
  2. "Third-harmonic generation in excitonic insulators"
    T. Tanabe, T. Kaneko, and Y. Ohta
    Phys. Rev. B 104, 245103/1-14 (2021)
  3. "Hybridization-Gap Formation and Superconductivity in the Pressure-Induced Semimetallic Phase of the Excitonic Insulator Ta2NiSe5" Editors' Choice
    K. Matsubayashi, H. Okamura, T. Mizokawa, N. Katayama, A. Nakano, H. Sawa, T. Kaneko, T. Toriyama, T. Konishi, Y. Ohta, H. Arima, R. Yamanaka, A. Hisada, T. Okada, Y. Ikemoto, T. Moriwaki, K. Munakata, A. Nakao, M. Nohara, Y. Lu, H. Takagi, and Y. Uwatoko
    J. Phys. Soc. Jpn. 90, 074706/1-6 (2021)
  4. "Anomalous fractional quantization in the kagomelike Heisenberg ladder: Emergence of the effective spin-1 chain"
    T. Yamaguchi, Y. Ohta, and S. Nishimoto
    Phys. Rev. B 103, 184410/1-16 (2021)
  5. "Light-induced switching of magnetic order in the anisotropic triangular-lattice Hubbard model"
    H. Kobayashi, R. Fujiuchi, K. Sugimoto, and Y. Ohta
    Phys. Rev. B 103, L161106/1-5 (2021)
  6. "Slow dynamics of disordered zigzag chain molecules in layered LiVS2 under electron irradiation"
    N. Katayama, K. Kojima, T. Yamaguchi, S. Hattori, S. Tamura, K. Ohara, S. Kobayashi, K. Sugimoto, Y. Ohta, K. Saitoh, and H. Sawa
    Npj Quantum Mater. 6, 16/1-7 (2021)

2020

  1. "Robust atomic orbital in the cluster magnet LiMoO2"
    N. Katayama, H. Takeda, T. Yamaguchi, Y. Yamada, K. Iida, M. Takigawa, Y. Ohta, and H. Sawa
    Phys. Rev. B 102, 081106(R)/1-6 (2020)
  2. "Superconductivity and charge density wave under a time-dependent periodic field in the one-dimensional attractive Hubbard model"
    R. Fujiuchi, T. Kaneko, K. Sugimoto, S. Yunoki, and Y. Ohta
    Phys. Rev. B 101, 235122/1-7 (2020)
  3. "Emergence of pure spin current in doped excitonic magnets"
    S. Yamamoto, K. Sugimoto, and Y. Ohta
    Phys. Rev. B 101, 174428/1-7 (2020)
  4. "Finite-Temperature Properties of Excitonic Condensation in the Extended Falicov–Kimball Model: Cluster Mean-Field-Theory Approach"
    M. Kadosawa, S. Nishimoto, K. Sugimoto, and Y. Ohta
    J. Phys. Soc. Jpn. 89, 053706/1-5 (2020)
  5. "Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy"
    D. Ootsuki, K. Sawada, H. Goto, D. Hirai, D. Shibata, M. Kawamoto, A. Yasui, E. Ikenaga, M. Arita, H. Namatame, M. Taniguchi, T. Toriyama, T. Konishi, Y. Ohta, N. Saini, T. Yoshida, T. Mizokawa, and H. Takagi
    Phys. Rev. B 101, 165113/1-6 (2020)
  6. "Observation of a Novel Phase Transition in Sr7Re4O19"
    Y. Ueda, M. Murase, Y. Kobayashi, M. Itoh, T. Yajima, T. Yamaguchi, R. Takahashi, K. Sugimoto, and Y. Ohta
    J. Phys. Soc. Jpn. 89, 054703/1-5 (2020)
  7. "Variety of order-by-disorder phases in the asymmetric J1-J2 zigzag ladder: From the delta chain to the J1-J2 chain"
    T. Yamaguchi, S. Drechsler, Y. Ohta, and S. Nishimoto
    Phys. Rev. B 101, 104407/1-18 (2020)
  8. "Typicality-Based Variational Cluster Approach to Thermodynamic Properties of the Hubbard Model"
    H. Nishida, R. Fujiuchi, K. Sugimoto, and Y. Ohta
    J. Phys. Soc. Jpn. 89, 023702/1-4 (2020)

2019

  1. "Photoinduced electron-electron pairing in the extended Falicov-Kimball model"
    R. Fujiuchi, T. Kaneko, Y. Ohta, and S. Yunoki
    Phys. Rev. B 100, 045121/1-14 (2019)
  2. "Quantum phase transitions in the dimerized extended Bose-Hubbard model"
    K. Sugimoto, S. Ejima, F. Lange, and H. Fehske
    Phys. Rev. A 99, 012122/1-7 (2019)
  3. "Spin texture and spin current in excitonic phases of the two-band Hubbard model"
    H. Nishida, S. Miyakoshi, T. Kaneko, K. Sugimoto, and Y. Ohta
    Phys. Rev. B 99, 035119/1-12 (2019)

2018

  1. "Nonequilibrium dynamics in the pump-probe spectroscopy of excitonic insulators"
    T. Tanabe, K. Sugimoto, and Y. Ohta
    Phys. Rev. B 98, 235127/1-8 (2018)
  2. "Exotic criticality in the dimerized spin-1 XXZ chain with single-ion anisotropy"
    S. Ejima, T. Yamaguchi, F. H. L. Essler, F. Lange, Y. Ohta, and H. Fehske
    SciPost Phys. 5, 059/1-18 (2018) SciPost Select
  3. "Large entropy change derived from orbitally assisted three-centered two-electron σ bond formation in metallic Li0.33VS2"
    N. Katayama, S. Tamura, T. Yamaguchi, K. Sugimoto, K. Iida, T. Matsukawa, A. Hoshikawa, T. Ishigaki, S. Kobayashi, Y. Ohta, and H. Sawa
    Phys. Rev. B 98, 081104(R)/1-6 (2018)
  4. "Strong Coupling Nature of the Excitonic Insulator State in Ta2NiSe5"
    K. Sugimoto, S. Nishimoto, T. Kaneko, and Y. Ohta
    Phys. Rev. Lett. 120, 247602/1-5 (2018)
  5. "Excitonic Order and Superconductivity in the Two-Orbital Hubbard Model: Variational Cluster Approach"
    R. Fujiuchi, K. Sugimoto, and Y. Ohta
    J. Phys. Soc. Jpn. 87, 063705/1-5 (2018)
  6. "Exciton-phonon cooperative mechanism of the triple-q charge-density-wave and antiferroelectric electron polarization in TiSe2"
    T. Kaneko, Y. Ohta, and S. Yunoki
    Phys. Rev. B 97, 155131/1-23 (2018)
  7. "Ferromagnetic Peierls insulator state in AMg4Mn6O15 (A = K, Rb, Cs)"
    T. Yamaguchi, K. Sugimoto, Y. Ohta, Y. Tanaka, and H. Sato
    Phys. Rev. B 97, 161103(R)/1-5 (2018)

2017

  1. "Excitonic Insulator State of the Extended Falicov–Kimball Model in the Cluster Dynamical Impurity Approximation"
    K. Hamada, T. Kaneko, S. Miyakoshi, and Y. Ohta
    J. Phys. Soc. Jpn. 86, 074709/1-6 (2017)
  2. 「相関電子系における励起子凝縮の物理の新展開」
    太田幸則、金子竜也、杉本高大
    固体物理 第52巻 第3号, pp.119-137 (2017)
  3. "Low-Energy Excitation Spectra in the Excitonic Phase of Cobalt Oxides"
    T. Yamaguchi, K. Sugimoto, and Y. Ohta
    J. Phys. Soc. Jpn. 86, 043701/1-4 (2017)
  4. "Mott transition and magnetism of the triangular-lattice Hubbard model with next-nearest-neighbor hopping"
    K. Misumi, T. Kaneko, and Y. Ohta
    Phys. Rev. B 95, 075124/1-7 (2017)
  5. "Reversed Crystal-Field Splitting and Spin–Orbital Ordering in α-Sr2CrO4"
    T. Ishikawa, T. Toriyama, T. Konishi, H. Sakurai, and Y. Ohta
    J. Phys. Soc. Jpn. 86, 033701/1-4 (2017)

2016

  1. "Entanglement properties of the Haldane phases: A finite system-size approach"
    S. Miyakoshi, S. Nishimoto, and Y. Ohta
    Phys. Rev. B 94, 235155/1-12 (2016)
  2. "Electric and magnetic multipoles and bond orders in excitonic insulators"
    T. Kaneko and Y. Ohta
    Phys. Rev. B 94, 125127/1-15 (2016)
  3. "Orbital diamagnetic susceptibility in excitonic condensation phase"
    K. Sugimoto and Y. Ohta
    Phys. Rev. B 94, 085111/1-6 (2016)
  4. "Mott Transitions and Staggered Orders in the Three-Component Fermionic System: Variational Cluster Approach"
    T. Hasunuma, T. Kaneko, S. Miyakoshi, and Y. Ohta
    J. Phys. Soc. Jpn. 85, 074704/1-7 (2016)
  5. "Phase Diagram of the Frustrated Square-Lattice Hubbard Model: Variational Cluster Approach"
    K. Misumi, T. Kaneko, and Y. Ohta
    J. Phys. Soc. Jpn. 85, 064711/1-7 (2016)
  6. "Microscopic quantum interference in excitonic condensation of Ta2NiSe5"
    K. Sugimoto, T. Kaneko, and Y. Ohta
    Phys. Rev. B 93, 041105(R)/1-5 (2016)

2015

  1. "Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings"
    T. Kaneko, B. Zenker, H. Fehske, and Y. Ohta
    Phys. Rev. B 92, 115106/1-7 (2015)
  2. "Metal-Insulator Transition of Dirac Fermions: Variational Cluster Study"
    M. Ebato, T. Kaneko, and Y. Ohta
    J. Phys. Soc. Jpn. 84, 044714/1-5 (2015)

2014

  1. "Roles of Hund's Rule Coupling in Excitonic Density Wave States"
    T. Kaneko and Y. Ohta
    Phys. Rev. B 90, 245144/1-7 (2014)
  2. "Excitonic Bose-Einstein condensation in Ta2NiSe5 above room temperature"
    K. Seki, Y. Wakisaka,T. Kaneko, T. Toriyama, T. Konishi, T. Sudayama, N. L. Saini, M. Arita, H. Namatame, M. Taniguchi, N. Katayama, M. Nohara, H. Takagi, T. Mizokawa, and Y. Ohta
    Phys. Rev. B 90, 155116/1-7 (2014)
  3. "Charge and orbital orderings associated with metal-insulator transition in V6O13"
    T. Toriyama, T. Nakayama, T. Konishi, and Y. Ohta
    Phys. Rev. B 90, 085131/1-9 (2014)
  4. "Te 5p orbitals bring three-dimensional electronic structure to two-dimensional Ir0.95Pt0.05Te2"
    D. Ootsuki, T. Toriyama, S. Pyon, K. Kudo, M. Nohara, K. Horiba, M. Kobayashi, K. Ono, H. Kumigashira, T. Noda, T. Sugimoto, A. Fujimori, N. L. Saini, T. Konishi, Y. Ohta, and T. Mizokawa
    Phys. Rev. B 89, 104506/1-4 (2014)
  5. "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, S. Pyon, K. Kudo, M. Nohara, T. Sugimoto, T. Yoshida, M. Horio, A. Fujimori, M. Arita, H. Anzai, H. Namatame, M. Taniguchi, N. L. Saini, T. Konishi, Y. Ohta, and T. Mizokawa
    J. Phys. Soc. Jpn. 83, 033704/1-4 (2014)
  6. "Switching of Conducting Planes by Partial Dimer Formation in IrTe2"
    T. Toriyama, M. Kobori, T. Konishi, Y. Ohta, K. Sugimoto, J. Kim, A. Fujiwara, S. Pyon, K. Kudo, and M. Nohara
    J. Phys. Soc. Jpn. 83, 033701/1-5 (2014)
  7. "BCS-BEC Crossover in the Two-Dimensional Attractive Hubbard Model: Variational Cluster Approach"
    T. Kaneko and Y. Ohta
    J. Phys. Soc. Jpn. 83, 024711/1-6 (2014)
  8. "Order, Criticality, and Excitations in the Extended Falicov-Kimball Model"
    S. Ejima, T. Kaneko, Y. Ohta, and H. Fehske
    Phys. Rev. Lett. 112, 026401/1-5 (2014)

2013

  1. "Superatomic crystal emerging in transition-metal oxides: Molybdenum hollandite K2Mo8O16"
    T. Toriyama, M. Watanabe, T. Konishi, and Y. Ohta
    Phys. Rev. B 88, 235116/1-8 (2013)
  2. "Magnetic properties and Mott transition in the square-lattice Hubbard model with frustration"
    A. Yamada, K, Seki, R. Eder, and Y. Ohta
    Phys. Rev. B 88, 075114/1-12 (2013)
  3. "Exact-diagonalization study of exciton condensation in electron bilayers"
    T. Kaneko, S. Ejima, H. Fehske, and Y. Ohta
    Phys. Rev. B 88, 035312/1-5 (2013)
  4. "Quasiparticle states in the antiferromagnetic phase of double exchange systems"
    K. Nakano, R. Eder, Y. Ohta, and P. Wróbel
    Eur. Phys. J. B 86, 314/1-10 (2013)
  5. "Antiferromagnetic topological insulator state in the correlated Bernevig-Hughes-Zhang model"
    S. Miyakoshi and Y. Ohta
    Phys. Rev. B 87, 195133/1-6 (2013)
  6. "Ground-state phase diagram of the asymmetric Hubbard Model with geometrical frustration"
    S. Yamaki, K. Seki, and Y. Ohta
    Phys. Rev. B 87, 125112/1-6 (2013)
  7. "Orthorhombic-to-monoclinic phase transition of Ta2NiSe5 induced by the Bose-Einstein condensation of excitons"
    T. Kaneko, T. Toriyama, T. Konishi, and Y. Ohta
    Phys. Rev. B 87, 035121/1-5 (2013); 87, 199902(E) (2013)

2012

  1. "EXACT WAVEFUNCTION OF THE ONE-DIMENSIONAL DOUBLE-EXCHANGE MODEL WITH ONE ELECTRON"
    K. Nakano, R. Eder, and Y. Ohta
    Int. J. Mod. Phys. B 26, 1250154/1-18 (2012)
  2. "Double Exchange Ferromagnetism in the Peierls Insulator State"
    S. Nishimoto and Y. Ohta
    Phys. Rev. Lett. 109, 076401/1-5 (2012)
  3. "Excitonic insulator state in the two-orbital Hubbard model: Variational cluster approach"
    T. Kaneko, K. Seki, and Y. Ohta
    Phys. Rev. B 85, 165135/1-7 (2012)
  4. "Potential Antiferromagnetic Fluctuations in Hole-Doped Iron-Pnictide Superconductor Ba1-xKxFe2As2 Studied by 75As Nuclear Magnetic Resonance"
    M. Hirano, Y. Yamada, T. Saito, R. Nagashima, T. Konishi, T. Toriyama, Y. Ohta, H. Fukazawa, Y. Kohori, Y. Furukawa, K. Kihou, C.-H. Lee, A. Iyo, and H. Eisaki
    J. Phys. Soc. Jpn. 81 , 054704/1-10 (2012)

2011

  1. "BCS-BEC Crossover in the Extended Falicov-Kimball Model: Variational Cluster Approach"
    K. Seki, R. Eder, and Y. Ohta
    Phys. Rev. B 84, 245106/1-10 (2011)
  2. "Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O16"
    T. Toriyama, A. Nakao, Y. Yamaki, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe, Y. Ueda, A. V. Ushakov, D. I. Khomskii, S. V. Streltsov, T. Konishi, and Y. Ohta
    Phys. Rev. Lett. 107, 266402/1-5 (2011)
  3. "Spin Gap of the Three-Leg S=3/2 Heisenberg Tube"
    S. Nishimoto, Y. Fuji, and Y. Ohta
    Phys. Rev. B 83, 224425/1-5 (2011)
  4. "Self-Energy and Fermi Surface of the Two-Dimensional Hubbard Model"
    R. Eder, K. Seki, and Y. Ohta
    Phys. Rev. B 83, 205137/1-17 (2011)
  5. "Mott Transition and Ferrimagnetism in the Hubbard Model on the Anisotropic Kagome Lattice"
    A. Yamada, K. Seki, R. Eder, and Y. Ohta
    Phys. Rev. B 83, 195127/1-5 (2011)
  6. "Quasi-One-Dimensional Electronic Structure of Hollandite Ruthenate K2Ru8O16"
    T. Toriyama, M. Watanabe, T. Konishi, and Y. Ohta
    Phys. Rev. B 83, 195101/1-6 (2011)
  7. "Theory of the Waterfall Phenomenon in Cuprate Superconductors"
    D. Katagiri, K. Seki, R. Eder, and Y. Ohta
    Phys. Rev. B 83, 165124/1-11 (2011)

2010

  1. "Theory of the Lightly Doped Mott Insulator"
    R. Eder, P. Wróbel, and Y. Ohta
    Phys. Rev. B 82, 155109/1-10 (2010)

2009

  1. "K2Cr8O16 predicted as a Half-Metallic Ferromagnet: Scenario for a Metal-Insulator Transition"
    M. Sakamaki, T. Konishi, and Y. Ohta
    Phys. Rev. B 80, 024416/1-6 (2009); 82, 099903(E)
  2. "Spin and Density Excitations in the Triangular-Lattice t-J Model with Multiple-Spin Exchange Interactions: 3He on Graphite"
    K. Seki, T. Shirakawa, and Y. Ohta
    Phys. Rev. B 79, 024303/1-8 (2009)

2008

  1. "Antiferromagnetism versus Kondo Screening in the Two-Dimensional Periodic Anderson Model at Half Filling: Variational Cluster Approach"
    S. Horiuchi, S. Kudo, T. Shirakawa, and Y. Ohta
    Phys. Rev. B 78, 155128/1-5 (2008)
  2. "Coexistence of Distinct Charge Fluctuations in θ-(BEDT-TTF)2X"
    S. Nishimoto, M. Shingai, and Y. Ohta
    Phys. Rev. B 78, 035113/1-9 (2008)
  3. "Superconductivity in a Model of Two Hubbard Chains Coupled with Ferromagnetic Exchange Interaction"
    T. Shirakawa, S. Nishimoto, and Y. Ohta
    Phys. Rev. B 77, 224510/1-10 (2008)
  4. "Theoretical Study of the Electronic States of Hollandite Vanadate K2V8O16"
    S. Horiuchi, T. Shirakawa, and Y. Ohta
    Phys. Rev. B 77, 155120/1-6 (2008)
  5. "Phase Diagram of the One-Dimensional Hubbard Model with Next-Nearest-Neighbor Hopping"
    S. Nishimoto, K. Sano, and Y. Ohta
    Phys. Rev. B 77, 085119/1-10 (2008)
  6. "Charge and Spin Excitation Spectra in the One-Dimensional Hubbard Model with Next-Nearest-Neighbor Hopping"
    S. Nishimoto, T. Shirakawa, and Y. Ohta
    Phys. Rev. B 77, 115102/1-6 (2008)

2007

  1. "Theoretical Study on Superconductivity in Boron-Doped Diamond"
    T. Shirakawa, S. Horiuchi, Y. Ohta, and H. Fukuyama
    J. Phys. Soc. Jpn. 76, 014711/1-9 (2007)

2006

  1. "Spin and Charge Excitations in the Anisotropic Hubbard Ladder at Quarter Filling with Charge-Ordering Instability"
    Y. Ohta, T. Nakaegawa, and S. Ejima
    Phys. Rev. B 73, 045101/1-8 (2006)

2005

  1. "Phase Diagram of the t-U-V1-V2 Model at Quarter Filling"
    S. Ejima, S. Nishimoto, F. Gebhard, and Y. Ohta
    Phys. Rev. B 72, 033101/1-4 (2005)
  2. "Ring-Exchange Mechanism for Triplet Superconductivity in a Two-Chain Hubbard Model: Possible Relevance to Bechgaard Salts"
    Y. Ohta, S. Nishimoto, T. Shirakawa, and Y. Yamaguchi
    Phys. Rev. B 72, 012503/1-4 (2005)

2004

  1. "Angle-Resolved Photoemission Spectra of the Stripe Phase in the Two-Dimensional t-J Model"
    R. Eder and Y. Ohta
    Phys. Rev. B 69, 100502(R)/1-4 (2004)
  2. "Dynamical Domain Walls and Spin-Peierls Order in Doped Antiferromagnets: Evidence from Exact Diagonalization of Small Clusters"
    R. Eder and Y. Ohta
    Phys. Rev. B 69, 094433/1-4 (2004)

2003

  1. "Anomalous Behaviors of the Charge and Spin Degrees of Freedom in the CuO Double Chains of PrBa2Cu4O8"
    S. Nishimoto and Y. Ohta
    Phys. Rev. B. 68, 235114/1-9 (2003)

2002

  1. "Optical Conductivity in the CuO Double Chains of PrBa2Cu4O8: Consequences of Charge Fluctuation"
    R. Amasaki, Y. Shibata, and Y. Ohta
    Phys. Rev. B 66, 012502/1-4 (2002)
  2. "Charge and Orbital Ordering in the Triangular-Lattice t2g-Orbital System in One Dimension: A Possible Ground State of BixV8O16"
    Y. Shibata and Y. Ohta
    J. Phys. Soc. Jpn. 71, 513-518 (2002)

2001

  1. "Charge Ordering in the One-Dimensional Extended Hubbard Model: Implication to the TMTTF Family of Organic Conductors"
    Y. Shibata, S. Nishimoto, and Y. Ohta
    Phys. Rev. B 64, 235107-235112 (2001)
  2. "Madelung Energy and Charge Ordering in β-Phase Vanadate Bronzes"
    S. Nishimoto and Y. Ohta
    J. Phys. Soc. Jpn. 70, 309-310 (2001)
  3. "Effects of Intersite Repulsion in the One-Dimensional Dimerized Hubbard Model at Quarter Filling"
    S. Nishimoto, T. Yamaguchi, Y. Shibata, and Y. Ohta
    J. Phys. Chem. Solids 62, 289-292 (2001)
  4. "Metal-Insulator Transition in the Acentric Hubbard Ladders at Quarter Filling: A Self-Doping Mechanism"
    S. Nishimoto and Y. Ohta
    J. Phys. Chem. Solids 62, 277-280 (2001)

2000

  1. "Charge Gap of the Quasi-One-Dimensional Organic Conductors: A Density-Matrix Renormalization-Group Study"
    S. Nishimoto, M. Takahashi, and Y. Ohta
    J. Phys. Soc. Jpn. 69, No. 6, 1594-1597 (2000)

1999

  1. "Ground-State Phase Diagram of the One-Dimensional Dimerized t-J Model at Quarter Filling"
    S. Nishimoto and Y. Ohta
    Phys. Rev. B 59, 4738-4745 (1999)

1998

  1. "A Model Study of the Low-Energy Charge Dynamics of NaV2O5"
    S. Nishimoto and Y. Ohta
    J. Phys. Soc. Jpn. 67, 4010-4013 (1998)
  2. "Optical Conductivity of the Trellis-Lattice t-J Model: Charge Fluctuations in NaV2O5"
    S. Nishimoto and Y. Ohta
    J. Phys. Soc. Jpn. 67, 3679-3682 (1998)
  3. "NaV2O5 as an Anisotropic t-J Ladder at Quarter Filling"
    S. Nishimoto and Y. Ohta
    J. Phys. Soc. Jpn. 67, 2996-2999 (1998)
  4. "Critical Dimerization Strength of the Quarter-Filled t-J Model"
    S. Nishimoto and Y. Ohta
    J. Phys. Soc. Jpn 67, 2598-2601 (1998)
  5. "Landau Mapping and Fermi Liquid Parameters of the Two-Dimensional t-J Model"
    S. Nishimoto, Y. Ohta, and R. Eder
    Phys. Rev. B 57, R5590-R5593 (1998)

1997

  1. "One-Dimensional t-J Model with Next-Nearest-Neighbor Hopping: Breakdown of the Luttinger Liquid"
    R. Eder and Y. Ohta
    Phys. Rev. B 56, R14247-R14250 (1997)
  2. "Photoemission Spectra of the t-J Model in One and Two Dimensions: Similarities and Differences"
    R. Eder and Y. Ohta
    Phys. Rev. B 56, 2542-2550 (1997)
  3. "Bogoliubov Quasiparticle Spectra of the Effective d-Wave Model for Cuprate Superconductivity"
    Y. Ohta, M. Yamaguchi, and R. Eder
    Phys. Rev. B 56, 11262-11266 (1997)

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