Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Akagi, Yutaka"'
Publikováno v:
Phys. Rev. B 110, 125111 (2024)
High harmonic generation (HHG) is a striking phenomenon, which reflects the ultrafast dynamics of electrons. Recently, it has been demonstrated that HHG can be used to reconstruct not only the energy band structure but also the geometric structure ch
Externí odkaz:
http://arxiv.org/abs/2405.01351
Many large-scale phenomena in our Universe, such as gravitational waves, are challenging to reproduce in laboratory settings. However, parallels with condensed matter systems can provide alternative routes for experimental accessibility. Here we show
Externí odkaz:
http://arxiv.org/abs/2310.10078
Publikováno v:
Phys. Rev. Res. 6, L032050 (2024)
We theoretically propose the electric field induced thermal Hall effect of triplons in the quantum dimer magnets $X$CuCl$_{3}$ ($X =$ Tl, K), which exhibit ferroelectricity in the Bose-Einstein condensation phase of triplons. The interplay between fe
Externí odkaz:
http://arxiv.org/abs/2309.12812
Autor:
Yamada, Masahiko G., Sanno, Takumi, Takahashi, Masahiro O., Akagi, Yutaka, Suwa, Hidemaro, Fujimoto, Satoshi, Udagawa, Masafumi
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 efficiently. Here we propose an improved formulation of continuous tensor net
Externí odkaz:
http://arxiv.org/abs/2212.13267
Publikováno v:
Phys. Rev. B 106, L100406 (2022)
We study $\mathbb{C}P^2$ Skyrmion crystals in the ferromagnetic SU(3) Heisenberg model with a generalization of the Dzyaloshinskii-Moriya interaction and the Zeeman term. The model possesses two different types of Skyrmion crystals with unit-Skyrmion
Externí odkaz:
http://arxiv.org/abs/2204.01476
Publikováno v:
Phys. Rev. Research 4 (2022) 033106
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 also intrinsically interesting, not least because they can support quadru
Externí odkaz:
http://arxiv.org/abs/2203.09819
Autor:
Ono, Atsushi, Akagi, Yutaka
Publikováno v:
Phys. Rev. B 108, L100407 (2023)
Noncoplanar magnetic structures, such as magnetic skyrmions, are characterized by spin chirality and usually favored by antisymmetric exchange interactions in noncentrosymmetric magnets. Here, we show that a linearly polarized electric-field pulse st
Externí odkaz:
http://arxiv.org/abs/2112.08815
Autor:
Kondo, Hiroki, Akagi, Yutaka
Publikováno v:
Phys. Rev. Research 4, 013186 (2022)
In this Letter, we study the spin Nernst effect (SNE) of magnons in the nonlinear response regime. We derive the formula for the nonlinear magnon spin Nernst current by solving the Boltzmann equation and find out that it is described by an extended B
Externí odkaz:
http://arxiv.org/abs/2109.09464
Publikováno v:
Phys. Rev. B 105, L201113 (2022)
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-valued Berry phase is known to be quantized in the presence of certain sym
Externí odkaz:
http://arxiv.org/abs/2108.12860
Publikováno v:
JHEP 11 (2021) 194
We study fractional Skyrmions in a $\mathbb{C}P^2$ baby Skyrme model with a generalization of the easy-plane potential. By numerical methods, we find stable, metastable, and unstable solutions taking the shapes of molecules. Various solutions possess
Externí odkaz:
http://arxiv.org/abs/2107.13777