The Excitations of One-Dimensional Spin 1/2 Antiferromagnets

J. C. Bonner, Bill Sutherland, Peter M. Richards

Takafumi Suzuki, Sei-ichiro Suga

Spinon confinement is key to the understanding of quantized excitation spectra in quasi-one-dimensional $S$ = \textonehalf{} spin systems. The authors investigate the quantization of the excitation continuum in quasi-one-dimensional $S=1$ antiferromagnetic spin systems with single-ion anisotropy $D$. When $D$ 0, the magnon continuum is quantized by the interchain interactions. This is due to magnon confinement. The present study suggests the possibility for observation of quantized spectra in many $S=1$ antiferromagnetic spin-chain compounds.

M. Drawid

Eduardo Fradkin

E. V. Orlenko, Fedor E. Orlenko, George G. Zegrya

We are interested in the anisotropic S=1 antiferromagnetic chain. System of particles with an arbitrary spin is described directly from the first principles, based on the symmetry law. The ground state of the one-dimensional S=1 pseudo-Heisenberg antiferromagnet with single-ion anisotropy is calculated. Excitations of the chain in the form of nonlinear spin waves and, in particular, the possibility of a soliton solution is considered.

勉 桃井