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Dynamical mean-field analysis of ordered phases in the half-filled Holstein-Hubbard model
Yuta Murakami, Philipp Werner, Naoto Tsuji +1
We investigate ordered phases (s-wave superconducting (SC), antiferromagnetic (AF) and charge ordered (CO) phases) of the half-filled Holstein-Hubbard model using the dynamical mea…
Nonequilibrium dynamical mean-field theory and its applications
Hideo Aoki, Naoto Tsuji, Martin Eckstein +3
The study of nonequilibrium phenomena in correlated lattice systems has developed into an active and exciting branch of condensed matter physics. This research field provides rich…
Phase diagram and pair Tomonaga-Luttinger liquid in a Bose-Hubbard model with flat bands
Shintaro Takayoshi, Hosho Katsura, Noriaki Watanabe +1
To explore superfluidity in flat-band systems, we consider a Bose-Hubbard model on a cross-linked ladder with flux, which has a flat band with a gap between the other band for…
Pressure effects and orbital characters in cuprate and carbon-based superconductors
Hideo Aoki, Toshikaze Kariyado
Pressure effect is overviewed for the cuprates and carbon-based superconductors, with an emphasis on how their orbital characters are modified by pressure. For the high-Tc cuprates…
Nonequilibrium dynamical cluster theory
Naoto Tsuji, Peter Barmettler, Hideo Aoki +1
We study the effect of spatially nonlocal correlations on the nonequilibrium dynamics of interacting fermions by constructing the nonequilibrium dynamical cluster theory, a cluster…
Ordered phases in the Holstein-Hubbard model: Interplay of strong Coulomb interaction and electron-phonon coupling
Yuta Murakami, Philipp Werner, Naoto Tsuji +1
We study the Holstein-Hubbard model at half filling to explore ordered phases including su- perconductivity (SC), antiferromagnetism (AF), and charge order (CO) in situations where…