Resistive transition and fluctuation conductivity in Bi2Sr2CaCu2O8+delta single crystals
作者： S. H. Han , Yu. Eltsev , Ö. Rapp
关键词: Physics 、 Superconducting transition temperature 、 Electrical resistivity and conductivity 、 Conductivity 、 Zero field 、 Coherence length 、 Condensed matter physics
摘要: Detailed resistivity measurements were made along the planes of ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ single crystals in zero field and temperature region above superconducting transition ${T}_{c}.$ Analyses fluctuation conductivity \ensuremath{\Delta}\ensuremath{\sigma} are presented using a careful construction mean-field critical ${T}_{c}^{\mathrm{mf}}.$ can be described by Lawrence-Doniach model with two-dimensional (2D)-3D crossover close to The $c$-axis coherence length was found 0.9\ifmmode\pm\else\textpm\fi{}0.1 \AA{}. For comparison also calculated from ${T}_{c}$ defined peak $d\ensuremath{\rho}/dT.$ It is shown that consistent description 2D-3D then lost.
harvard.edu
irgrid.ac.cn参考文章(15)
S. J. Hagen, Z. Z. Wang, N. P. Ong, Anomalous in-plane paraconductivity in single-crystal YBa2Cu3O7. Physical Review B. ,vol. 38, pp. 7137- 7140 ,(1988) , 10.1103/PHYSREVB.38.7137
T. A. Friedmann, J. P. Rice, John Giapintzakis, D. M. Ginsberg, In-plane paraconductivity in a single crystal of superconducting YBa2Cu3O7-x. Physical Review B. ,vol. 39, pp. 4258- 4266 ,(1989) , 10.1103/PHYSREVB.39.4258
A Pomar, A Díaz, MV Ramallo, C Torrón, JA Veira, Félix Vidal, None, Measurements of the paraconductivity in the a-direction of untwinned Y1Ba2Cu3O7−δ single crystals Physica C-superconductivity and Its Applications. ,vol. 218, pp. 257- 271 ,(1993) , 10.1016/0921-4534(93)90291-W
W. Holm, Yu. Eltsev, Ö. Rapp, Paraconductivity along the a and b axes in YBa2Cu3O7- delta single crystals. Physical Review B. ,vol. 51, pp. 11992- 11995 ,(1995) , 10.1103/PHYSREVB.51.11992
C. J. Lobb, Critical fluctuations in high-T c superconductors Physical Review B. ,vol. 36, pp. 3930- 3932 ,(1987) , 10.1103/PHYSREVB.36.3930
S. Martin, A. T. Fiory, R. M. Fleming, G. P. Espinosa, A. S. Cooper, Vortex-pair excitation near the superconducting transition of Bi2Sr2CaCu2O8 crystals. Physical Review Letters. ,vol. 62, pp. 677- 680 ,(1989) , 10.1103/PHYSREVLETT.62.677
Mi-Ock Mun, Sung-Ik Lee, Sung-Ho Suck Salk, H. J. Shin, M. K. Joo, Conductivity fluctuations in a single crystal of Bi2Sr2CaCu2Ox. Physical Review B. ,vol. 48, pp. 6703- 6706 ,(1993) , 10.1103/PHYSREVB.48.6703
A. K. Pradhan, S. B. Roy, P. Chaddah, C. Chen, B. M. Wanklyn, Fluctuation phenomena in excess conductivity and magnetization of single-crystalBi2Sr2CaCu2O8+y Physical Review B. ,vol. 50, pp. 7180- 7183 ,(1994) , 10.1103/PHYSREVB.50.7180
I. G. Gorlova, S. G. Zybtsev, V. Ya. Pokrovskii, Nonlinear conductivity of the layered BSCCO (2212) whiskers and dimensional crossover near the superconducting transition Czechoslovak Journal of Physics. ,vol. 46, pp. 1099- 1100 ,(1996) , 10.1007/BF02583857
A. Pomar, M. V. Ramallo, J. Mosqueira, C. Torrón, Félix Vidal, Fluctuation-induced in-plane conductivity, magnetoconductivity, and diamagnetism of Bi2Sr2CaCu2O8 single crystals in weak magnetic fields. Physical Review B. ,vol. 54, pp. 7470- 7480 ,(1996) , 10.1103/PHYSREVB.54.7470