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Mechanism of superconductivity and electron-hole doping asymmetry in -type molecular conductors
Hiroshi Watanabe, Hitoshi Seo, Seiji Yunoki
Unconventional superconductivity in molecular conductors is observed at the border of metal-insulator transitions in correlated electrons under the influence of geometrical frustra…
Photoinduced Pairing in the Hubbard Model
Tatsuya Kaneko, Tomonori Shirakawa, Sandro Sorella +1
By employing unbiased numerical methods, we show that pulse irradiation can induce unconventional superconductivity even in the Mott insulator of the Hubbard model. The superconduc…
Variational cluster approach to thermodynamic properties of interacting fermions at finite temperatures: A case study of the two-dimensional single-band Hubbard model at half filling
Kazuhiro Seki, Tomonori Shirakawa, Seiji Yunoki
We formulate a finite-temperature scheme of the variational cluster approximation (VCA) particularly suitable for an exact-diagonalization cluster solver. Based on the analytical p…
Electronic structures of iMAX phases and their two-dimensional derivatives: A family of piezoelectric materials
Mohammad Khazaei, Vei Wang, Cem Sevik +3
Recently, a group of MAX phases, (MoY)AlC, (MoSc)AlC, (WSc)AlC, (WY)AlC, and (VZr)$_…
Ground state phase diagram of Kitaev-Heisenberg model on honeycomb-triangular lattice
Masanori Kishimoto, Katsuhiro Morita, Yukihiro Matsubayashi +3
The Kitaev-Heisenberg model defined on both honeycomb and triangular lattices has been studied intensively in recent years as a possible model to describe spin-orbital physics in i…
Spin transport through a spin-1/2 XXZ chain contacted to fermionic leads
Florian Lange, Satoshi Ejima, Tomonori Shirakawa +2
We employ matrix-product state techniques to numerically study the zero-temperature spin transport in a finite spin-1/2 XXZ chain coupled to fermionic leads with a spin bias voltag…
Correlation-Driven Dimerization and Topological Gap Opening in Isotropically Strained Graphene
Sandro Sorella, Kazuhiro Seki, Oleg O. Brovko +4
The phase diagram of isotropically expanded graphene cannot be correctly predicted by ignoring either electron correlations, or mobile carbons, or the effect of applied stress, as…
Insights into exfoliation possibility of MAX phases to MXenes
Mohammad Khazaei, Ahmad Ranjbar, Keivan Esfarjani +3
Chemical exfoliation of MAX phases into two-dimensional (2D) MXenes can be considered as a major breakthrough in the synthesis of novel 2D systems. To gain insight into the exfolia…
Quantum criticality in the metal-superconductor transition of interacting Dirac fermions on a triangular lattice
Yuichi Otsuka, Kazuhiro Seki, Sandro Sorella +1
We investigate a semimetal-superconductor phase transition of two-dimensional Dirac electrons at zero temperature by large-scale and essentially unbiased quantum Monte Carlo simula…