Universal scaling behavior of the c-axis resistivity of high-temperature superconductors

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Y. H. Su
Center for Advanced Studies, Tsinghua University, Beijing 100084, China

H. G. Luo
Institute of Theoretical Physics and Interdisciplinary Centre of Theoretical Studies, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China

T. Xiang
Institute of Theoretical Physics and Interdisciplinary Centre of Theoretical Studies, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China and Center for Advanced Studies, Tsinghua University, Beijing 100084, China

Received 10 February 2006; published 10 April 2006

Wepropose and show that the c-axis transport in high-temperature superconductorsis controlled by the pseudogap energy and the c-axis resistivitysatisfies a universal scaling law in the pseudogap phase. Wederived approximately a scaling function for the c-axis resistivity andfound that it fits well with the experimental data ofBi₂Sr₂CaCu₂O₈₊, Bi₂Sr₂Ca₂Cu₃O₁₀₊, and YBa₂Cu₃O_7–. Our works reveals the physical originof the semiconductorlike behavior of the c-axis resistivity and suggeststhat the c-axis hopping is predominantly coherent.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.73.134510
DOI:	10.1103/PhysRevB.73.134510
PACS:	74.25.Fy; 74.72.-h 74.25.Fy Transport properties of superconductors including electric and thermal conductivity, thermoelectric effects, etc 74.72.-h Cuprate superconductors (high-T_c and insulating parent compounds) YEAR: 2006
KEYWORDS:	high-temperature superconductors, electrical resistivity, energy gap

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