c-axis resistance peak above the critical temperature in layered superconductors

G. Balestrino; E. Milani; C. Aruta; A. A. Varlamov

doi:10.1103/PhysRevB.54.3628

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c-axis resistance peak above the critical temperature in layered superconductors

G. Balestrino, E. Milani, C. Aruta, A. A. Varlamov

DOI 10.1103/PhysRevB.54.3628 · Physical Review B

T1

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Abstract

The possibility of fully describing the behavior of transverse resistivity ρc in cuprate superconductors exclusively in terms of some recently proposed normal-state models is discussed. It is shown that these models do not give a completely satisfactory description of the apparent singularity in ρc at the critical temperature in Bi2Sr2CaCu2O8+x, and that they fail to describe data concerning a lower-Tc cuprate superconductor as Bi2Sr2CuO6+x (Tc≃15 K). It is argued that these difficulties cannot be overcome considering the normal-state contribution to ρc only. The role of the density of states fluctuations in the behavior of ρc just above the transition temperature is recalled. It is shown that, taking into account this contribution, it is possible to dramatically simplify the description of the normal-state transverse resistivity. This can give important hints for the understanding of the transverse electrical transport properties of these materials. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CuO6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	15	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown