2010/01/01 by T Kawamata, T. Kawamata, N Kaneko +7 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chemical and Physical Properties of Materials #Conductivity #Electrical resistivity and conductivity #Impurity #Physics of Superconductivity and Magnetism #Spin (aerodynamics) #Spinon #Thermal conductivity #cond-mat.str-el
paper · pdf · doi:10.1088/1742-6596/200/2/022023
published as Journal of Physics: Conference Series 200, 022023 (2010) · 5 pages, 2 figures, 1 table
openalex publication_date 2010/01/01 · arxiv created 2011/03/09 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have measured the thermal conductivity along the c -axis parallel to the spin-chains, κ c , of the one-dimensional antiferromagnetic spin system SrCuO 2 , using as-grown and O 2 -annealed single-crystals grown from raw materials with 99.9 % (3N) and 99.99 % (4N) purity. The value of κ c around 50 K, where large contribution of the thermal conductivity due to spinons, κ spinon , is observed, is markedly enhanced by both the increase of the purity of raw materials and the O 2 -annealing. Therefore, the increase of κ c implies that κ spinon is enhanced due to the decrease of spin defects caused by impurities in raw materials and by oxygen defects. The mean free path of spinons is as large as about 24000 Å at low temperatures in the O 2 -annealed single-crystal grown from raw materials with 4N purity.