Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy

Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy

We present intrinsic tunneling spectroscopy measurements on small Bi2Sr2CaCu2O8+x mesas. The tunnel conductance curves show both sharp peaks at the superconducting gap voltage and broad humps representing the c-axis pseudogap. The superconducting gap vanishes at Tc, while the pseudogap exists both a...

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Bibliographic Details
Published in:Physical review letters Vol. 84; no. 25; pp. 5860 - 5863
Main Authors: Krasnov, V M, Yurgens, A, Winkler, D, Delsing, P, Claeson, T
Format: Journal Article
Language:English
Published: United States 19-06-2000
Online Access:Get full text
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Summary:We present intrinsic tunneling spectroscopy measurements on small Bi2Sr2CaCu2O8+x mesas. The tunnel conductance curves show both sharp peaks at the superconducting gap voltage and broad humps representing the c-axis pseudogap. The superconducting gap vanishes at Tc, while the pseudogap exists both above and below Tc. Our observation implies that the superconducting and pseudogaps represent different coexisting phenomena.
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ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.84.5860