It is found by measuring the low-field conductivity of segments of TaS3 single crystals
that a current pulse equal to or larger than threshold for sliding charge-density-wave
(CDW) conduction permanently destroys the inversion symmetry of the sample. The segments
are limited at one end by the usual silver paint contacts which strongly perturb the
motion of CDW's while at the other end a special weakly perturbing contact is applied.
The low-field resistance of the segments depends on whether the last sliding CDW current
pulse enters or exists the strongly perturbing contact. The results are interpreted
as a direct confirmation of current-induced remanent CDW polarization recently reported
by Janossy, Mihaly, and Kriza.
