Spin soliton dynamics and pressure effects in the spin-Peierls system (DMe-DCNQI)2M (M=Li, Ag)

Abstract (DMe-DCNQI)2M (M=Li, Ag) is a 1 4 -filled spin-Peierls system. We study the spin/charge dynamics in the insulating state by EPR. The linewidth shows exponential dependence at T≫Tsp. Further, pressure enhances mainly prefactor of the exponential dependences. These results are successfully understood in terms of the relaxation accompanied with the intercolumn hopping caused by the spin–orbit interaction both for the Li and Ag salts. This is consistent with the scenario that the hole and spin solitons help the intercolumn charge and spin transports.