169 citations · 695 across the 25 of their papers we have counts for
14 papers · 1 filter
Matrix Product Renormalization Group: Potential Universal Quantum Many-Body Solver
Masahiko G. Yamada, Takumi Sanno, Masahiro O. Takahashi +4
The density matrix renormalization group (DMRG) is a celebrated tensor network algorithm, which computes the ground states of one-dimensional quantum many-body systems very efficie…
Semi-classical simulation of spin-1 magnets
Kimberly Remund, Rico Pohle, Yutaka Akagi +2
Theoretical studies of magnets have traditionally concentrated on either classical spins, or the extreme quantum limit of spin-1/2. However, magnets built of spin-1 moments are als…
Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
Atsushi Ono, Yutaka Akagi
Noncoplanar magnetic structures, such as magnetic skyrmions, are characterized by spin chirality and usually favored by antisymmetric exchange interactions in noncentrosymmetric ma…
Symmetry-protected quantization of complex Berry phases in non-Hermitian many-body systems
Shoichi Tsubota, Hong Yang, Yutaka Akagi +1
We investigate the quantization of the complex-valued Berry phases in non-Hermitian quantum systems with certain generalized symmetries. In Hermitian quantum systems, the real-valu…
Quantum solitons with emergent interactions in a model of cold atoms on the triangular lattice
Hiroaki T. Ueda, Yutaka Akagi, Nic Shannon
Cold atoms bring new opportunities to study quantum magnetism, and in particular, to simulate quantum magnets with symmetry greater than . Here we explore the topological ex…
Spontaneous formation of kagome network and Dirac half-semimetal on a triangular lattice
Yutaka Akagi, Yukitoshi Motome
In spin-charge coupled systems, geometrical frustration of underlying lattice structures can give rise to nontrivial magnetic orders and electronic states. Here we explore such a p…
Surface and interface effects on a magnetic Chern insulator
Ryo Ozawa, Masafumi Udagawa, Yutaka Akagi +1
Effects of an open surface on a magnetic Chern insulator are investigated in comparison with those of an interface to a capping magnetic layer. In magnets, an open surface often pe…
Reconstruction of chiral edge states in a magnetic Chern insulator
Ryo Ozawa, Masafumi Udagawa, Yutaka Akagi +1
We study reconstruction of the chiral edge states in a magnetic Chern insulator in the Kondo lattice model on a triangular lattice at 1/4 filling. In this state, the spin scalar ch…
Effect of Quantum Spin Fluctuation on Scalar Chiral Ordering in the Kondo Lattice Model on a Triangular Lattice
Yutaka Akagi, Masafumi Udagawa, Yukitoshi Motome
Spin scalar chiral ordering gives rise to nontrivial topological characters and peculiar transport properties. We here examine how quantum spin fluctuations affect the spin scalar…
Linear Spin Wave Analysis for General Magnetic Orders in the Kondo Lattice Model
Yutaka Akagi, Masafumi Udagawa, Yukitoshi Motome
We extend the formulation of the spin wave theory for the Kondo lattice model, which was mainly used for the ferromagnetic metallic state, to general magnetic orders including comp…
Ground-state phase diagram of the Kondo lattice model on triangular-to-kagome lattices
Yutaka Akagi, Yukitoshi Motome
We investigate the ground-state phase diagram of the Kondo lattice model with classical localized spins on triangular-to-kagome lattices by using a variational calculation. We iden…
Hidden Multiple-spin Interactions as an Origin of Spin Scalar Chiral Order in Frustrated Kondo Lattice Models
Yutaka Akagi, Masafumi Udagawa, Yukitoshi Motome
We reveal the significance of kinetic-driven multiple-spin interactions hidden in geometrically-frustrated Kondo lattice models. Carefully examining the perturbation in terms of th…
Noncoplanar spin canting in lightly-doped ferromagnetic Kondo lattice model on a triangular lattice
Yutaka Akagi, Yukitoshi Motome
Effect of the coupling to mobile carriers on the 120 antiferromagnetic state is investigated in a ferromagnetic Kondo lattice model on a frustrated triangular lattice. Usin…
Spin chirality ordering and anomalous Hall effect in the ferromagnetic Kondo lattice model on the triangular lattice
Yutaka Akagi, Yukitoshi Motome
We investigate the ground-state phase diagram for the ferromagnetic Kondo lattice model on a triangular lattice by a variational calculation for various spin orderings up to a four…