110 citations · 378 across the 15 of their papers we have counts for
4 papers · 1 filter
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…
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…