Interlayer Tunneling Spectroscopy for Bi2Sr2CaCu2O8+δ Using Intrinsic Junctions
By means of the interlayer tunneling spectroscopy, which employs very thin mesas comprised of approximately 10 series-connected intrinsic tunnel Josephson junctions of Bi2Sr2CaCu2O8+δ, we have obtained the following important findings. The normal tunneling resistance exhibits linear temperature dependence above T c, and shows a sharp drop below T c, implying that the major in-plane scattering of quasiparticles is due to electron-electron interaction. The superconducting gap is clearly discriminated from the pseudogap, which is at variance with a previously accepted picture for the relationship between the superconducting gap and the pseudogap.
KeywordsVersus Curve Josephson Junction Tunnel Junction Tunneling Resistance Scanning Tunneling Spectroscopy
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