Faculty Information - KOBAYASHI Kenji

Office

Academic background

Present specialized field

Works

（Last updated : 2025-09-02 13:15:11）

KOBAYASHI Kenji
Center for Education (Faculty of Engineering), Faculty of Engineering

Professor

■ Office

Shin-Narashino Campus, No.2 Building,3rd floor chemistry 7th laboratory

■ Academic background

1983/04～1986/03

〔Doctorial Course〕, Graduate School, Division of Science and Engineering, Waseda University, Accomplished credits for doctoral program

■ Present specialized field

Key Word：Quantum Chemistry,Chemical Physics,Quantum Theory of Condensed Matter

■ Works

1.	Article	Excited States Beyond Mott Gap in Half-Filled-Band Hubbard Model Journal of the Physical Society of Japan 91(12),pp.124705-1-124705-11 (Collaboration) 2022/11/09
2.	Article	Insulator-to-superconductor transition by exciting half-filled d-wave pairing state beyond Mott gap J. of Physics: Conference Series 1590,pp.012016-1-012016-7 (Collaboration) 2020/07/31
3.	Article	Possibility of Pomeranchuk instability in staggered flux state J. of Physics: Conference Series 1590,pp.012017-1-012017-8 (Collaboration) 2020/07/31
4.	Article	Impurity Effect on Magnetism and Mott Transitions in Hubbard Model on Anisotropic Triangular Lattice JPS Conference Proceedings 30,pp.011004-1-011004-6 (Collaboration) 2020/03
5.	Article	Metallization of Mott Insulators through Percolation in Partially Filled Impurity Hubbard Model JPS Conference Proceedings 30,pp.011003-1-011003-6 (Collaboration) 2020/03
6.	Article	Pomeranchuk instability in Strongly Correlated Hubbard Model JPS Conference Proceedings 30,pp.011046-1-011046-6 (Collaboration) 2020/03
7.	Article	Impurity induced insulator-to-metal transitions in half-filled Mott insulators J. of Physics: Conference Series 1293,pp.012024-1-012024-8 (Collaboration) 2019/10
8.	Article	Relationship between superconductivity and anisotropy in two-dimensional Hubbard model J. of Physics: Conference Series 1293,pp.012025-1-012025-8 (Collaboration) 2019/10
9.	Article	Impurity-induced Mott transitions in partially filled antiferromagnetic states Journal of Physics: Conference Series 1054,pp.012014-1-01214-7 (Collaboration) 2018/08
10.	Article	Interplay between staggered flux and d-wave superconducting orders in t-t'-J model Journal of Physics: Conference Series 1054,pp.012016-1-012016-8 (Collaboration) 2018/08
11.	Article	Effect of impurity potentials on antiferromagnetism in two-dimensional Hubbard model Journal of Physics: Conference Series 871,pp.012032-1-012032-6 (Collaboration) 2017/07
12.	Article	Interplay between staggered flux and d-wave superconducting states in Hubbard model Journal of Physics: Conference Series 871,pp.012031-1-012031-6 (Collaboration) 2017/07
13.	Article	Band-renormalization effect on relationship between superconductivity and antiferromagnetism in t-J model Physics Procedia 81,pp.1-4 (Collaboration) 2016/05
14.	Article	Predominance of Antiferromagnetism in Two-Dimensional Underdoped Hubbard Model Physics Procedia 81,pp.9-12 (Collaboration) 2016/05
15.	Article	Effects of weak intersite repulsion and negative diagonal transfer on superconductivity and antiferromagnetism in Hubbard model Physics Procedia 65,pp.9-12 (Collaboration) 2015/06
16.	Article	Stability of Staggered Flux State for Anisotropic Triangular Lattice Physics Procedia 58,pp.14-17 (Collaboration) 2014/10
17.	Article	Superconductivity and Phase Separation in Extended Hubbard Model Physics Procedia 58,pp.22-25 (Collaboration) 2014/10
18.	Article	Coexistence and Mutual Exclusion of Superconductivity and Antiferromagnetism, and Phase Separation in Hubbard Model JPS Conference Proceedings 3,pp.015012 (Collaboration) 2014/06
19.	Article	Band Renormalization Effect on Interplay between Antiferromagnetism and Superconductivity in Hubbard Model JPS Conference Proceedings 1,pp.012120 (Collaboration) 2014/03
20.	Article	Coexistence of superconductivity and antiferromagnetism and its effects on crossover as to correlation strength in Hubbard model Physics Procedia 45,pp.17-20 (Collaboration) 2013/05
21.	Article	Variational study of conduction in doped Mott insulator in terms of kinetic energy Physics Procedia 45,pp.9-12 (Collaboration) 2013/05
22.	Article	Crossover between BCS Superconductor and Doped Mott Insulator of d-wave Pairing State in Two-Dimensional Hubbard Model Journal of the Physical Society of Japan 82(1),pp.014707-1-014707-27 (Collaboration) 2013/01
23.	Article	Strongly correlated nature of d-wave superconductivity in cuprates Physics Procedia 27,pp.60-63 (Collaboration) 2012
24.	Article	Antiferromagnetism and pairing symmetries in two-dimensional t-J model Physica C: Superconductivity 470,pp.106-108 (Collaboration) 2010/12
25.	Article	Close relation between antinodal Fermi-surface effect and superconductivity in cuprates Physica C: Superconductivity 470,pp.149-150 (Collaboration) 2010/12
26.	Article	Competition and coexistence of antiferromagnetism and superconductivity in the Hubbard model Physica C: Superconductivity 470,pp.947-948 (Collaboration) 2010/12
27.	Article	Superconductivity and antiferromagnetism in the phase diagram of the frustrated Hubbard model within a variational study Physica C: Superconductivity 470(20),pp.1081-1084 (Collaboration) 2010/11
28.	Article	Interplay between antiferromagnetism and superconductivity in the Hubbard model with frustration Physica C: Superconductivity 469(15-20),pp.974-978 (Collaboration) 2009/10
29.	Article	Interplay between Antiferromagnetism and Superconductivity in Two-Dimensional Hubbard model Journal of Physics and Chemistry of Solids 69(12),pp.3274-3276 (Collaboration) 2008/12
30.	Article	Improved wave functions for Hubbard model: Superconductivity and Mott transition Physica C: Superconductivity 463-465(1),pp.141-145 (Collaboration) 2007/10
31.	Article	Superconducting states in a two-orbital Hubbard model on a triangular lattice Journal of Magnetism and Magnetic Materials 310(2),pp.651-653 (Collaboration) 2007/03
32.	Article	Stability of the superconducting state in the two-band Hubbard model on a triangular lattice Physica C: Superconductivity 445-448(1),pp.162-165 (Collaboration) 2006/10
33.	Article	Variational Monte Carlo Study of Two Dimensional Multi-Orbital Hubbard Model Proceedings of 24th International Conference on Low Temperature Physics, AIP Conference Proceedings 850,pp.1458-1459 (Collaboration) 2006/09
34.	Article	Variational ground state of a two-orbital Hubbard model Journal of Physics and Chemistry of Solids 66(8),pp.1384-1387 (Collaboration) 2005/09
35.	Article	Hole Density in Charge Stripes and Effect of Next-Nearest-Neighbor Transfer Journal of Low Temperature Physics 117(3),pp.199-203 (Collaboration) 1999/12
36.	Article	Stability of the striped phase in the two-dimensional t-J model: A variational Monte Carlo study Physica B: Condensed Matter 259-261(1),pp.506-508 (Collaboration) 1999/03
37.	Article	Variational state based on the Bethe-ansatz solution and a correlated singlet liquid state in the one-dimensional t-J model Physical Review B 54(18),pp.13129-13137 (Collaboration) 1996/11
38.	Article	Improved wave function for strongly correlated electronic systems Physical Review B 47(4),pp.1775-1781 (Collaboration) 1993/01
39.	Article	Pairing mechanism in the CuO₂ system based on a variational Monte Carlo study with magnetically frustrated wave function Physical Review B 40(10),pp.7073-7079 (Collaboration) 1989/10
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