Zobrazeno 1 - 10
of 358
pro vyhledávání: '"SAKAI, Toru"'
We study the $S = 1/2$ Heisenberg antiferromagnet on the Lieb lattice accompanied by additional interactions that create frustration. The system exhibits a ferrimagnetic ground state in the absence of frustration. Further, we successfully observe a n
Externí odkaz:
http://arxiv.org/abs/2409.16715
Autor:
Sakai, Tôru, Okamoto, Kiyomi, Okunishi, Kouichi, Hashimoto, Masaru, Houda, Tomoki, Furuchi, Rito, Nakano, Hiroki
Publikováno v:
Phys. Rev. B 108, 174435 (2023)
We investigate the S=1 antiferromagnetic quantum spin chain with the exchange and single-ion anisotropies in a magnetic field, using the numerical exact diagonalization of finite-size clusters, the level spectroscopy analysis, and the density matrix
Externí odkaz:
http://arxiv.org/abs/2311.07123
Autor:
Yamaguchi, Hironori, Takahashi, Hiroki, Kawakami, Takashi, Okamoto, Kiyomi, Sakai, Toru, Yajima, Takeshi, Iwasaki, Yoshiki
Publikováno v:
Phys. Rev. B 107, L161111 (2023)
We present an organic compound exhibiting a spin-Peierls (SP) transition to an effective spin-1 antiferromagnetic uniform chain, that is, the Haldane chain. The clear disappearance of magnetization, accompanied by a structural phase transition, is we
Externí odkaz:
http://arxiv.org/abs/2304.13970
The magnetization process of the $S=1/2$ distorted diamond spin chain with the anisotropic ferromagnetic interaction is investigated using the numerical diagonalization of finite-size clusters. It is found that the spin nematic and SDW Tomonaga-Lutti
Externí odkaz:
http://arxiv.org/abs/2211.06618
The $S=1/2$ Heisenberg antiferromagnet on the floret-pentagonal lattice with two kinds of interaction strength is studied by the numerical-diagonalization method. It is known that, near the five-ninth of the saturation magnetization, this system show
Externí odkaz:
http://arxiv.org/abs/2209.13887
Autor:
Nakano, Hiroki, Sakai, Toru
The $S=1/2$ Heisenberg antiferromagnet on the orthogonal-dimer lattice (Shastry-Sutherland model) is studied by the Lanczos diagonalization method. The properties of this model are determined by the ratio of two interactions, namely, $r=J_2/J_1$, whe
Externí odkaz:
http://arxiv.org/abs/2209.13105
Autor:
Nakanishi, Ryosuke, Yamada, Takaharu, Furuchi, Rito, Nakano, Hiroki, Kaneyasu, Hirono, Okamoto, Kiyomi, Tonegawa, Takashi, Sakai, Tôru
The $S=1/2$ ferromagnetic-antiferromagnetic bond-alternating spin chain with the anisotropy on the ferromagnetic exchange interaction in magnetic field is investigated using the numerical diagonalization and the density matrix renormalization group a
Externí odkaz:
http://arxiv.org/abs/2209.09740
Autor:
Sakai, Tôru, Nakanishi, Ryosuke, Yamada, Takaharu, Furuchi, Rito, Nakano, Hiroki, Kaneyasu, Hirono, Okamoto, Kiyomi, Tonegawa, Takashi
The $S=1/2$ quantum spin ladder system with the anisotropic ferromagnetic exchange interaction on the rung under magnetic field is investigated using the numerical diagonalization and the density matrix renormalization group (DMRG) analyses. It is fo
Externí odkaz:
http://arxiv.org/abs/2208.10994
We numerically investigate the ground-state phase diagram of the $S=1/2$ ferromagnetic-antiferromagnetic bond-alternating chain, in which the ferromagnetic interactions are stronger than the antiferromagnetic ones, and the anisotropies of the former
Externí odkaz:
http://arxiv.org/abs/2208.10988
Autor:
Yamada, Takaharu, Nakanishi, Ryosuke, Furuchi, Rito, Nakano, Hiroki, Kaneyasu, Hirono, Okamoto, Kiyomi, Tonegawa, Takashi, Sakai, Tôru
The magnetization plateau of the $S=2$ antiferromagnetic chain with interaction and single-ion anisotropies is investigated using the numerical diagonalization of finite-size clusters and some size scaling analyses. The previous level spectroscopy an
Externí odkaz:
http://arxiv.org/abs/2208.10983