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Nature of the Fluctuation Conductivity in La1:87Y0:13CuO4
Hyun-Sook Lee,이성익,Akio Tsukada,Heon-Jung Kim,Hyun-Jung Kim,Michio Naito 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.5I
The in-plane resistivity (½) of La1:87Y0:13CuO4 with Tc ¼ 17 K was measured and analyzed as a function of the temperature (T). From the ½(T) measured under various magnetic .elds (H) for H k c, we determined the °uctuation conductivity ¾fl = 1=½(T) ¡ 1=½n(T). The normal-state resistivity ½n(T) in this compound was shown to follow a T2 dependence for 20 K < T < 200 K and a logarithmically corrected T2 dependence for 200 K < T < 300 K. The ¾fl followed the three-dimensional (3D) scaling behavior suggested by Ullah and Dorsey. This is consistent with the previously reported 3D nature of La1:87Y0:13CuO4 obtained from the angle-dependent critical current density and the angle-dependent vortex glass transition temperature [1,2].