Effects of doping on the transport properties of the quasi-one-dimensionalsystem (TaSe4)(2)I

Studies of the effect of uncharged niobium impurities on the transport prop erties in (TaSe4)(2)I show that the Peierls transition T(P)approximate to 2 50-260K in the pure specimens is smeared out and suppressed in the alloys. The temperature of the Peierls transition T-P and the low temperature energ y gap Delta decrease linearly by increasing impurity concentration. In addi tion, the contribution to the thermal conductivity from the thermally assis ted phason motion and charge-density-wave fluctuation lessen by increasing the impurity concentration.