研究者詳細 - 南　和彦

論文 - 南　和彦

分割表示 33 件中 1 - 20 件目／全件表示 >>

Conserved charges of series of solvable lattice models Open Access

Minami, K

NUCLEAR PHYSICS B 1012 巻 2025年3月

The Exact Susceptibility of the Spin-S Transverse Ising Chain with Next-nearest-neighbor Interactions

Minami, K

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 92 巻 ( 5 ) 2023年5月

Onsager algebra and algebraic generalization of Jordan-Wigner transformation

Minami, K

NUCLEAR PHYSICS B 973 巻 2021年12月

Geometric criterion for solvability of lattice spin systems

Ogura, M; Imamura, Y; Kameyama, N; Minami, K; Sato, M

PHYSICAL REVIEW B 102 巻 ( 24 ) 2020年12月

Exact solution of a cluster model with next-nearest-neighbor interaction

Yanagihara, Y; Minami, K

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2020 巻 ( 11 ) 2020年11月

Honeycomb lattice Kitaev model with Wen-Toric-code interactions, and anyon excitations

Minami, K

NUCLEAR PHYSICS B 939 巻頁： 465 - 484 2019年2月

Infinite number of solvable generalizations of XY-chain, with cluster state, and with central charge <i>c</i> = <i>m</i>/2

Minami, K

NUCLEAR PHYSICS B 925 巻頁： 144 - 160 2017年12月

Solvable Hamiltonians and fermionization transformations obtained from operators satisfying specific commutation relations, 査読有り

Kazuhiko Minami

J. Phys. Soc. Jpn. 85 巻頁： 024003 2016年12月

Equivalence between the two-dimensional Ising model and the quantum XY chain with randomness and with open boundary. 査読有り

Kazuhiko Minami

Europhys. Lett. 108 巻頁： 30001 2014年10月

Exact transverse susceptibility of one-dimensional random bond Ising model with alternating spin. 査読有り

Kazuhiko Minami

J. Phys. A: Math. Theor. 46 巻頁： 505005 2013年11月

Fractal structure of a solvable lattice model 査読有り

Kazuhiko Minami

Int. J. Pure and Applied Math. 59 巻頁： 243-255 2010年

Spin-1/2 Ising-Heisenberg model with the pair XYZ Heisenberg interaction and quartic Ising interactions as the exactly soluble zero-field eight-vertex model 査読有り

Jozef Strecka, Lucia Canova and Kazuhiko Minami

Phys.Rev.E 79 巻頁： 051103 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）

The spin-1/2 Ising-Heisenberg model with the pair XYZ Heisenberg interaction and quartic Ising interactions is exactly solved by establishing a precise mapping relationship with the corresponding zero-field (symmetric) eight-vertex model. It is shown that the Ising-Heisenberg model with the ferromagnetic Heisenberg interaction exhibits a striking critical behavior, which manifests itself through re-entrant phase transitions as well as continuously varying critical exponents. The changes in critical exponents are in accordance with the weak universality hypothesis in spite of a peculiar singular behavior that emerges at a quantum critical point of the infinite order, which occurs at the isotropic limit of the Heisenberg interaction. On the other hand, the Ising-Heisenberg model with the antiferromagnetic Heisenberg interaction surprisingly exhibits less significant changes in both critical temperatures and critical exponents upon varying the strength of the exchange anisotropy in the Heisenberg interaction.

Weak universal critical behavior and quantum critical point of the exactly soluble spin-1/2 Ising-Heisenberg model with the pair XYZ Heisenberg and quartic Ising interactions 査読有り

Jozef Strecka, Lucia Canova and Kazuhiko Minami

AIP Conf. Proc. 1198 巻頁： 156-165 2009年

*The free energies of six-vertex models and the n-equivalence relation 査読有り

Kazuhiko Minami

J.Math.Phys. 49 巻頁： 033514 2008年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The free energies of six-vertex models on general domain D with various boundary conditions are investigated with the use of the n-equivalence relation which classifies the thermodynamic limit properties. It is derived that the free energy of the six-vertex model on the rectangle is unique in the limit in which both the height and the width goes to infinity. It is derived that the free energies of the model on D are classified through the densities of left/down arrows on the boundary. Specifically the free energy is identical to that obtained by Lieb and Sutherland with the cyclic boundary condition when the densities are both equal to 1/2. This fact explains several results already obtained through the transfer matrix calculations. The relation to the domino tiling (or dimer, or matching) problems is also noted.

An equivalence relation of boundary/initial conditions and the infinite limit properties 査読有り

J.Phys.Soc.Jpn. 74 巻頁： 1640 2005年

Thermodynamic properties of a tetramer Ising-Heisenberg bond alternating chain as a model system for Cu(3-Chloropyridine)2(N3)2 (共著) 査読有り

Phys.Rev. B 72 巻頁： 024459 (1-11) 2005年

On the saturation field of magnets 査読有り

J.Mag.Mag.Mat. 270 巻頁： 104 2004年

Magnetic properties of a tetramer ferro-ferro-antiferro-antiferromagnetic Ising-Heisenberg bond alternating chain as a model systemfor Cu(3-Clpy)2(N3)2 (共著) 査読有り

Czech.J.Phys. 54 巻 ( Suppl 4 ) 頁： 583 2004年

Magnetization process of an S=1/2 tetramer chain withferromagnetic-ferrimagnetic-antiferromagnetic bond alternating interactions (共著) 査読有り

J.Phys.Soc.Jpn. 72 巻頁： 943 2003年

Thermodynamic properties of a quantum ferrimagnet formed byan S=1/2 tetramer chain (共著) 査読有り

Prog.Theor.Phys. 145 巻頁： 150 2002年

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