Spin Dynamics in Spin-1/2 One-Dimensional Antiferromagnets at Low Temperature

Abstract

Proton spin-lattice relaxation time T₁ was measured at low temperature in the typical S=1⁄2 one-dimensional antiferromagnets, CuCl₂·2NC₅H₅ and Cu(C₆H₅COO)₂·3H₂O. From a combined discussion with an available data of ESR line width, the weak temperature dependence (1⁄T₁∝T^−0.25) is attributable to the weak divergence of the staggered spin correlation ⟨S_K0^zS_−K0^z⟩, possibly being less divergent than T^−0.25.