Thermal Conductivity of Ce Doped Bi-2212 Superconductors
LI Bo1, WU Bai-Mei1,2, M. Ausloos2
1Structural Research Laboratory, Department of Physics, University of Science and Technology of China, Hefei 230026
2SUPRATECS, B5, Université de Liege, B-4000 Liege, Belgium
Thermal Conductivity of Ce Doped Bi-2212 Superconductors
LI Bo1;WU Bai-Mei1,2;M. Ausloos2
1Structural Research Laboratory, Department of Physics, University of Science and Technology of China, Hefei 230026
2SUPRATECS, B5, Université de Liege, B-4000 Liege, Belgium
Abstract： The temperature dependence of the thermal conductivity in Bi2Sr2Ca1-xCexCu2Oy x = 0.1, 0.2, 0.3, 0.4 is presented. With increasing Ce-doping level, the thermal conductivity peak under Tc is suppressed then disappears, while another peak appears at low temperatures for the non-superconducting compounds. The numerical analysis shows that the thermal conductivity peak under Tc can be well described by the normal electron relaxation-time contribution model, and the phonon-induced thermal conductivity peak could be well described within the Debye approximation of the phonon spectrum. The existence and variation of these two thermal conductivity peaks indicate the adjustability between the superconducting and insulating components in the samples with different Ce-doping levels.
(Granular, melt-textured, amorphous, and composite superconductors)
引用本文:
LI Bo;WU Bai-Mei;M. Ausloos. Thermal Conductivity of Ce Doped Bi-2212 Superconductors[J]. 中国物理快报, 2004, 21(7): 1337-1339.
LI Bo, WU Bai-Mei, M. Ausloos. Thermal Conductivity of Ce Doped Bi-2212 Superconductors. Chin. Phys. Lett., 2004, 21(7): 1337-1339.
2004, Vol. 21 
