One dimensional antiferromagnetic spin systems

Shinya Takaishi

Shinya Takaishi

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.

Eduardo Fradkin

M. Drawid

Dongfang Chen

The magnetic order of a special quasi-one-dimensional Heisenberg antiferromagnetic spin model with numerical density matrix renormalization groups is discussed. The ground energy per unit cell, spin correlation function and the spin gap are calculated. Results show that the quasi-one-dimensional spin system has magnetic long-rang order under ground state and the spin correlation on chain is short-rang.