2001/08/17 by Kent R. Thurber, K. R. Thurber, A. W. Hunt +3 · 5 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.87.247202
published as Phys. Rev. Lett. 87, 247202 (2001). · Submitted to Phys. Rev. Lett. 4 pages, 4 figures
arxiv created 2001/08/17 · openalex publication_date 2001/11/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We used 17O NMR to probe the uniform (wave vector q\phantom\rule0ex0ex=\phantom\rule0ex0ex0) electron spin excitations up to 800 K in Sr2CuO3 and separate the q\phantom\rule0ex0ex=\phantom\rule0ex0ex0 from the q\phantom\rule0ex0ex=\phantom\rule0ex0ex\ifmmode±\else\textpm\fi\frac\ensuremathπa staggered components. Our results support the logarithmic decrease of the uniform spin susceptibility below T\ensuremath∼0.015J, where J\phantom\rule0ex0ex=\phantom\rule0ex0ex2200K. From measurement of the dynamical spin susceptibility for q\phantom\rule0ex0ex=\phantom\rule0ex0ex0 by the spin-lattice relaxation rate 1/T1, we demonstrate that the q\phantom\rule0ex0ex=\phantom\rule0ex0ex0 mode of spin transport is ballistic at the T\phantom\rule0ex0ex=\phantom\rule0ex0ex0 limit, but has a diffusion-like contribution at finite temperatures even for T\ensuremath≪J.