Soliton dynamics in 1D quantum antiferromagnets

Ferrer, A. Villares; Caldeira, A. O.; Pires, A. S. T.

Soliton dynamics in 1D quantum antiferromagnets

Authors

Ferrer, A. Villares

Caldeira, A. O.

Pires, A. S. T.

Description

The problem of dissipative motion of solitons in the case of tetramethyl ammonium manganese chloride (TMMC) is studied as a function of the external magnetic field and the temperature. Two specific situations are analyzed separately; the first, above the transition temperature $T_N$, in which the classical motion of the spin degree of freedom is described by a sine-Gordon (SG) equation of motion and, the second, below $T_N$, in which the system is described by a double sine-Gordon (2SG) equation of motion. The existence of a dissipative regime for the soliton motion and its influence on the dynamical structure factor -which might be experimentally detected- are reported.
8 pages, 4 figures