87Rb NMR spin-lattice relaxation in the charge-density wave phase of Rb0.3MoO3

P. Matus, P. Bánki, G. Kriza
1999 Journal de Physique IV : Proceedings  
The 87 Rb NMR spin-lattice relaxation rate (SLRR) has been measured in the charge-density wave (CDW) phase of the quasi-one-dimensional conductor Rb 0.3 MoO 3 in a magnetic field of 2 T perpendicular to the conducting chains. The SLRR exhibits a peak at the critical temperature T c = 180 K, attributed to the critical fluctuations at the phase transition. Two more broad peaks are observed within the CDW phase: one peak at 150 K (0.8 T c ) and another one at 60 K (0.3 T c ). We discuss the 0.8-T
more » ... discuss the 0.8-T c peak in terms of quantum coherence effects in analogy with the Hebel-Slichter peak in superconductors. The 60 K peak is attributed to the phase excitations of the CDW.
doi:10.1051/jp4:19991068 fatcat:ju4hdwpxfjannnzpvzvdygfanu