Zobrazeno 1 - 10
of 393
pro vyhledávání: '"Tohyama, Takami"'
We study superconductivity in Ammann-Beenker quasicrystals under magnetic field. By assuming an intrinsic $s$-wave pairing interaction and solving for mean-field equations self-consistently, we find gapless superconductivity in the quasicrystals at a
Externí odkaz:
http://arxiv.org/abs/2410.01236
By utilizing the twisted boundary conditions in the exact diagonalization method, we investigate the single-particle spectral function of the extended Peierls-Hubbard model at both half-filling and quarter filling. In one-dimensional (1D) interacting
Externí odkaz:
http://arxiv.org/abs/2407.13136
Publikováno v:
Phys. Rev. B 110, 035107 (2024)
We study the ground-state phase diagram of the half-filled extended Haldane-Hubbard model on the honeycomb lattice with sublattice-dependent on-site repulsion ($U_{\text{A/B}}$) using the exact diagonalization (ED) and mean-field (MF) methods. The re
Externí odkaz:
http://arxiv.org/abs/2407.02941
Clarifying similarities and differences in physical properties between crystalline and quasicrystalline systems is one of central issues in studying quasicrystals. To contribute to this, we apply multifractal and hyperuniform analyses to nonuniform s
Externí odkaz:
http://arxiv.org/abs/2406.05155
Utilizing the exact diagonalization method, we investigate the one-dimensional Peierls-Hubbard model at quarter filling, where it manifests as an antiferromagnetic Mott insulator in units of dimers. By increasing the on-site Coulomb repulsion U, we o
Externí odkaz:
http://arxiv.org/abs/2406.01110
Publikováno v:
Physical Review B 110, 125106 (2024)
Recent angle-resolved photoemission spectroscopy (ARPES) for a newly discovered doped one-dimensional (1D) Mott insulator Ba$_{2-x}$Sr$_x$CuO$_{3+\delta}$ proposed the presence of attractive charge interactions between neighboring sites if an 1D Hubb
Externí odkaz:
http://arxiv.org/abs/2404.11412
Publikováno v:
Physical Review Research 6, 033088 (2024)
Weyl superconductivity is a topological phase in three-dimensional crystals in which the Weyl equation describes quasiparticle excitation near band-touching points in momentum space called Weyl nodes. For quasicrystals which lack translational symmet
Externí odkaz:
http://arxiv.org/abs/2403.08889
Autor:
Shinjo, Kazuya, Tohyama, Takami
Publikováno v:
APL Mater. 12, 041109 (2024)
Recent advancements in pulse laser technology have facilitated the exploration of non-equilibrium spectroscopy of electronic states in the presence of strong electric fields across a broad range of photon energies. The Keldysh crossover serves as an
Externí odkaz:
http://arxiv.org/abs/2401.12584
We study two-dimensional $s$-wave topological superconductivity with Rashba spin-orbit coupling and Zeeman field in Penrose and Ammann-Beenker quasicrystals. By solving the Bogoliubov-de Gennes equations self-consistently for not only the superconduc
Externí odkaz:
http://arxiv.org/abs/2401.06355
The various magnetic orders observed in approximant crystals of Tsai-type quasicrystal are important for deepening our understanding of mysterious magnetism in quasicrystals. Using an icosahedral cluster model with inter-cluster interactions, we give
Externí odkaz:
http://arxiv.org/abs/2311.08055