110 citations · 644 across the 34 of their papers we have counts for
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Dynamic Spin Correlation Function of the Alternating Spin-1/2 Antiferromagnetic Chain with Competing Interactions
Shigeyoshi Mori, Isao Harada, Takashi Tonegawa
Dynamic spin correlation function of the antiferromagnetic spin chain with alternating nearest neighbor and competing next nearest neighbor interactions is studied using th…
Numerical Study of the Spin-1 Antiferromagnetic Heisenberg Chain with a Spin-1/2 Impurity
Takashi Tonegawa, Makoto Kaburagi
Low-lying excited states as well as the ground state of the spin-1 antiferromagnetic Heisenberg chain with a spin-1/2 impurity are studied by means of a method of numerical diagona…
Magnetic impurities coupled to quantum antiferromagnets in one dimension
J. Igarashi, T. Tonegawa, M. Kaburagi +1
Magnetic impurities coupled antiferromagnetically to a one-dimensional Heisenberg model are studied by numerical diagonalization of chains of finite clusters. By calculating the bi…
Effect of a Spin-1/2 Impurity on the Spin-1 Antiferromagnetic Heisenberg Chain
Makoto Kaburagi, Takashi Tonegawa
Low-lying excited states as well as the ground state of the spin-1 antiferro- magnetic Heisenberg chain with a spin-1/2 impurity are investigated by means of a variational method a…
Energy Versus Magnetic-Field Diagram of the Spin-1 Haldane System with an Impurity
M. Kaburagi, T. Tonegawa
Energy versus magnetic-field diagram of the spin- Haldane system with an impurity bond is studied in terms of spin-1/2 degree of freedom at the sites neighboring the impurity bo…
Impurity-Bond Effect on the Spin-1 Antiferromagnetic Heisenberg Chain
Makoto Kaburagi, Isao Harada, Takashi Tonegawa
Low-lying excited states of the spin-1 antiferromagnetic Heisenberg chain with an impurity bond are investigated in terms of domain-wall excitations by means of analytical methods…