Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Kaburagi, Makoto"'
By using mainly numerical methods, we investigate the ground-state phase diagram (GSPD) of an $S=1$ ferromagnetic-antiferromagnetic bond-alternating chain with the $XXZ$ and the on-site anisotropies. This system can be mapped onto an anisotropic spin
Externí odkaz:
http://arxiv.org/abs/1910.02456
Publikováno v:
JPS Conf. Proc. 3 014022 (2014)
We investigate the edge modes at T=0 in the intermediate-D (ID) phase and the large-D (LD) phase of the S=2 quantum spin chain with the XXZ anisotropy and the generalized on-site anisotropies by use of the DMRG. There exists a gapless edge mode in th
Externí odkaz:
http://arxiv.org/abs/1310.3385
Autor:
Okamoto, Kiyomi, Tonegawa, Takashi, Nakano, Hiroki, Sakai, Toru, Nomura, Kiyohide, Kaburagi, Makoto
Publikováno v:
J. Phys. Conf. Ser. 320, 012018 (2011)
We numerically investigate the ground-state phase diagram of an S=2 quantum spin chain with the $XXZ$ and on-site anisotropies described by ${\mathcal H}=\sum_j (S_j^x S_{j+1}^x+S_j^y S_{j+1}^y+\Delta S_j^z S_{j+1}^z) + D \sum_j (S_j^z)^2$, where $\D
Externí odkaz:
http://arxiv.org/abs/1101.2799
Autor:
Tonegawa, Takashi, Okamoto, Kiyomi, Nakano, Hiroki, Sakai, Toru, Nomura, Kiyohide, Kaburagi, Makoto
Publikováno v:
J. Phys. Soc. Jpn. 80, 043001 (2011)
Using mainly numerical methods, we investigate the ground-state phase diagram of the S=2 quantum spin chain described by $H = \sum_j (S_j^x S_{j+1}^x + S_j^y S_{j+1}^y + \Delta S_j^z S_{j+1}^z) + D \sum_j (S_j^z)^2$, where $\Delta$ denotes the $XXZ$
Externí odkaz:
http://arxiv.org/abs/1011.6568
Publikováno v:
J. Phys. Soc. Jpn. 74 (2005) Suppl. 161
We investigate the finite-field ground state of the S=1 antiferromagnetic-ferromagnetic bond-alternating chain described by the Hamiltonian ${\calH}=\sum\nolimits_{\ell}\bigl\{\vecS_{2\ell-1}\cdot\vecS_{2\ell} +J\vecS_{2\ell}\cdot\vecS_{2\ell+1}\bigr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412234
Publikováno v:
J. Phys.: Condesed Matter 15 (2003) 5979
We explore, at T=0, the magnetic properties of the $S=1/2$ antiferromagnetic distorted diamond chain described by the Hamiltonian ${\cal H} = \sum_{j=1}^{N/3}{J_1 ({\bi S}_{3j-1} \cdot {\bi S}_{3j} + {\bi S}_{3j} \cdot {\bi S}_{3j+1}) + J_2 {\bi S}_{
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305057
We investigate the ground state properties of an S=1/2 distorted diamond chain described by the Hamiltonian ${\cal H}=J_1\sum_\ell\bigl\{\bigl(\vecS_{3\ell-1}\cdot\vecS_{3\ell} +\vecS_{3\ell}\cdot\vecS_{3\ell+1}\bigr)+J_2\vecS_{3\ell-2}\cdot\vecS_{3\
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912482
Publikováno v:
J. Phys.:Condensed Matter, Vol.11, No.50, pp.10485-10498 (1999)
We study the ground state of the model Hamiltonian of the trimerized $S=1/2$ quantum Heisenberg chain $\rm Cu_3 Cl_6 (H_2 O)_2 \cdot 2H_8 C_4 SO_2$ in which the non-magnetic ground state is observed recently. This model consists of stacked trimers an
Externí odkaz:
http://arxiv.org/abs/cond-mat/9907440
Employing a method of exact diagonalization for finite-size systems, we investigate the magnetization curve in the ground state of an antiferromagnetic spin-1/2 ladder with additional exchange interactions on diagonal bonds, which is equivalent to an
Externí odkaz:
http://arxiv.org/abs/cond-mat/9712297
Autor:
Tonegawa, Takashi, Hikihara, Toshiya, Kaburagi, Makoto, Nishino, Tomotoshi, Miyashita, Seiji, Mikeska, Hans-J"urgen
We investigate both analytically and numerically the ground-state and thermodynamic properties of the quantum mixed spin-1/2-1/2-1-1 chain described by the Hamiltonian $H=\sum_{\ell=1}^{N/4} (J_1\vecs_{4\ell-3}\cdot \vecs_{4\ell-2}+J_2\vecs_{4\ell-2}
Externí odkaz:
http://arxiv.org/abs/cond-mat/9712296