Quasiparticle tunneling current-voltage characteristics of intrinsic Josephson junctions in Bi2Sr2CaCu2O8+δ

Michihide Kitamura; Akinobu Irie; Gin-ichiro Oya

doi:10.1103/PhysRevB.66.054519

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Quasiparticle tunneling current-voltage characteristics of intrinsic Josephson junctions in Bi2Sr2CaCu2O8+δ

Michihide Kitamura, Akinobu Irie, Gin-ichiro Oya

DOI 10.1103/PhysRevB.66.054519 · Physical Review B

T1

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Abstract

A model to understand the overall profile of the quasiparticle (QP) tunneling current-voltage (I−V) characteristic of intrinsic Josephson junctions in high-Tc superconductors such as Bi2Sr2CaCu2O8+δ is presented. It is mentioned that the angular dependence of the energy gap Δk should be represented to be of sin2nθcos2φ type rather than the θ-independent purely two dimensional cos 2φ one. It is shown that the QP I−V characteristic calculated on the basis of our model including no empirical parameters well predicts our experimental I−V characteristic, and that the QP I−V characteristic calculated using n=2 is in very good agreement with the experiment on the whole voltage region.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	onset
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	130	Pressure not reported	unknown
HgBa2Ca2CuO8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	134	Pressure not reported	unknown