Spin-Peierls fluctuations in (TMTTF)(2)Br studied by pulsed electron spin resonance spin-lattice relaxation - art. no. 172404

摘要

Spin-Peierls lattice fluctuations were studied in the paramagnetic phase of the antiferromagnetic compound (TMTTF)(2)Br by pulsed electron spin resonance spin-lattice relaxation experiment. The relaxation via long-wavelength acoustic phonons was found to coexist with the relaxation via spin fluctuations. becoming the dominant relaxation mechanism in the temperature interval between about 50 K and just above the antiferromagnetic phase transition. This gives direct evidence on the presence of long-wavelength lattice fluctuations in the investigated temperature range. [References: 15]