NMR, EPR, and bulk susceptibility measurements of one-dimensional SrNbO3.41 -: art. no. 235414

NMR, EPR, and bulk susceptibility measurements were performed in the perovskite-related layered compound SrNbO3.41. We determined Nb-93 NMR spectra, spin-spin relaxation rates 1/T-2 and spin-lattice relaxation rates 1/T-1 down to 600 mK. From the spin-lattice relaxation 1/T-1 we identified an activated behavior 1/T(1)proportional to exp(-Delta (NMR)/k(B)T) with a gap Delta (NMR)=6.5 meV for temperatures T>20 K. Below 20 K, the line width DeltaH(T) from acceptor-EPR and (93)(1/T-1)(T) both exhibit a temperature dependence propotional to exp [-(T-0/T)(1/2)] which is indicative for a variable range hopping process. We discuss the possibility of charge-density-wave formation at low temperatures.