774 citations · 3.8k across the 47 of their papers we have counts for
19 papers · 1 filter
Optical response of the Leggett mode in multiband superconductors in the linear response regime
Takumi Kamatani, Sota Kitamura, Naoto Tsuji +2
We study optical responses of Leggett modes in multiband superconductors in the linear response regime. The Leggett mode is a collective mode unique to multiband superconductors th…
Out-of-time-ordered correlators of the Hubbard model: SYK strange metal in the spin freezing crossover region
Naoto Tsuji, Philipp Werner
The Sachdev-Ye-Kitaev (SYK) model describes a strange metal that shows peculiar non-Fermi liquid properties without quasiparticles. It exhibits a maximally chaotic behavior charact…
Momentum-dependent relaxation dynamics of the doped repulsive Hubbard model
Sharareh Sayyad, Naoto Tsuji, Abolhassan Vaezi +3
We study the dynamical behavior of doped electronic systems subject to a global ramp of the repulsive Hubbard interaction. We start with formulating a real-time generalization of t…
Classification and characterization of nonequilibrium Higgs modes in unconventional superconductors
L. Schwarz, B. Fauseweh, N. Tsuji +8
Recent findings of new Higgs modes in unconventional superconductors require a classification and characterization of the modes allowed by nontrivial gap symmetry. Here we develop…
Nonequilibrium Dynamical Cluster Approximation study of the Falicov-Kimball Model
Andreas J. Herrmann, Naoto Tsuji, Martin Eckstein +1
We use a nonequilibrium implementation of the dynamical cluster approximation (DCA) to study the effect of short-range correlations on the dynamics of the two-dimensional Falicov-K…
First-Principles Design of a Half-Filled Flat Band of the Kagome Lattice in Two-Dimensional Metal-Organic Frameworks
Masahiko G. Yamada, Tomohiro Soejima, Naoto Tsuji +3
We design from first principles a new type of two-dimensional metal-organic frameworks (MOFs) using phenalenyl-based ligands to exhibit a half-filled flat band of the kagome lattic…
Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation
Yuta Murakami, Philipp Werner, Naoto Tsuji +1
We study the relaxation of the Holstein model after a sudden switch-on of the interaction by means of the nonequilibrium dynamical mean field theory, with the self-consistent Migda…
Supersolid Phase Accompanied by a Quantum Critical Point in the Intermediate Coupling Regime of the Holstein Model
Yuta Murakami, Philipp Werner, Naoto Tsuji +1
We reveal that electron-phonon systems described by the Holstein model on a bipartite lattice exhibit, away from half filling, a supersolid (SS) phase characterized by coexisting c…
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…
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…
Nonthermal antiferromagnetic order and nonequilibrium criticality in the Hubbard model
Naoto Tsuji, Martin Eckstein, Philipp Werner
We study dynamical phase transitions from antiferromagnetic to paramagnetic states driven by an interaction quench in the fermionic Hubbard model using the nonequilibrium dynamical…
Nonthermal symmetry broken states in the strongly interacting Hubbard model
Philipp Werner, Naoto Tsuji, Martin Eckstein
We study the time evolution of the antiferromagnetic order parameter after interaction quenches in the Hubbard model. Using the nonequilibrium dynamical mean field formalism, we sh…
Repulsion-to-attraction transition in correlated electron systems triggered by a monocycle pulse
Naoto Tsuji, Takashi Oka, Hideo Aoki +1
We study the time evolution of the Hubbard model driven by a half-cycle or monocycle pulsed electric field F(t) using the nonequilibrium dynamical mean-field theory. We find that f…
Photoinduced insulator-metal transition in correlated electrons -- a Floquet analysis with the dynamical mean-field theory
Naoto Tsuji, Takashi Oka, Hideo Aoki
In order to investigate photoinduced insulator-metal transitions observed in correlated electron systems, we propose a new theoretical method, where we combine a Floquet-matrix met…
Photoinduced insulator-metal transition and nonlinear optical response of correlated electrons -- a DMFT analysis
Naoto Tsuji, Takashi Oka, Hideo Aoki
We investigate a photoinduced insulator-metal transition in the Falicov-Kimball model with the dynamical mean-field theory (DMFT) extended to nonequilibrium systems in periodic mod…
Nonequilibrium Steady State of Photoexcited Correlated Electrons in the Presence of Dissipation
Naoto Tsuji, Takashi Oka, Hideo Aoki
We present a framework to determine nonequilibrium steady states in strongly correlated electron systems in the presence of dissipation. This is demonstrated for a correlated elect…
Correlated electron systems periodically driven out of equilibrium: Floquet + DMFT formalism
Naoto Tsuji, Takashi Oka, Hideo Aoki
We propose to combine the Floquet formalism for systems in ac fields with the dynamical mean-field theory to study correlated electron systems periodically driven out of equilibriu…