Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy |
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Authors: | Krasnov V M Yurgens A Winkler D Delsing P Claeson T |
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Institution: | Department of Microelectronics and Nanoscience, Chalmers University of Technology, S-41296 G?teborg, Sweden. |
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Abstract: | 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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