Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6

K. Nakayama; T. Sato; Y. Sekiba; K. Terashima; P. Richard; T. Takahashi; K. Kudo; N. Okumura; T. Sasaki; N. Kobayashi

doi:10.1103/PhysRevLett.102.227006

Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6

Superconductivity 2015-05-13 v1 Strongly Correlated Electrons

Authors: K. Nakayama , T. Sato , Y. Sekiba , K. Terashima , P. Richard , T. Takahashi , K. Kudo , N. Okumura , T. Sasaki , N. Kobayashi

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Abstract

We have performed an ultrahigh-resolution angle-resolved photoemission spectroscopy study of slightly-overdoped (Bi,Pb)2Sr2CuO6 to elucidate the origin of pseudogap. By using a newly developed xenon-plasma light source, we determined the comprehensive momentum and temperature dependences of the superconducting gap and the pseudogap. We found that the antinodal pseudogap persists far above the superconducting transition temperature and is smoothly connected to the nodal gap. The characteristic temperature of the pseudogap scales well with the superconducting-gap size irrespective of the momentum location. The present experimental results point to the pairing origin of the pseudogap.

Keywords

pseudogap superconducting gap angle-resolved photoemission spectroscopy (Bi,Pb)2Sr2CuO6 pairing mechanism high-temperature superconductor

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@article{arxiv.0904.4079,
  title  = {Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6},
  author = {K. Nakayama and T. Sato and Y. Sekiba and K. Terashima and P. Richard and T. Takahashi and K. Kudo and N. Okumura and T. Sasaki and N. Kobayashi},
  journal= {arXiv preprint arXiv:0904.4079},
  year   = {2015}
}

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4 pages, 3 figures, to appear in PRL

Evolution of a pairing-induced pseudogap from the superconducting gap of (Bi,Pb)2Sr2CuO6

Abstract

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