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Scanning Tunneling Spectroscopy of Bi2Sr2CuO6+d: New Evidence for the Common Origin of the Pseudogap and Superconductivity

Renner, C; Kugler, M; Ono, S; Ando, Y; Fischer, O; (2001) Scanning Tunneling Spectroscopy of Bi2Sr2CuO6+d: New Evidence for the Common Origin of the Pseudogap and Superconductivity. Physical Review Letters , 86 (21) 4911 -4914. 10.1103/PhysRevLett.86.4911. Green open access

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Abstract

Using scanning tunneling spectroscopy, we investigated the temperature dependence of the quasiparticle density of states of overdoped Bi2Sr2CuO6+δ between 275 mK and 82 K. Below Tc = 10 K, the spectra show a gap with well-defined coherence peaks at ±Δp≃12 meV, which disappear at Tc. Above Tc, the spectra display a clear pseudogap of the same magnitude, gradually filling up and vanishing at T*≃68 K. The comparison with Bi2Sr2CaCu2O8+δ demonstrates that the pseudogap and the superconducting gap scale with each other, providing strong evidence that they have a common origin.

Type: Article
Title: Scanning Tunneling Spectroscopy of Bi2Sr2CuO6+d: New Evidence for the Common Origin of the Pseudogap and Superconductivity
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.86.4911
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.86.4911
Language: English
Additional information: © 2001 The American Physical Society
Keywords: Scanning, Tunneling, Spectroscopy, Bi2Sr2CuO6+d, Evidence, Common, Origin, Pseudogap, Superconductivity
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/9938
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