Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi2Sr2CaCuO8+δ Superconductors: Evidence of an s-wave structure for the pseudogap

S. Sakai*, S. Blanc, M. Civelli, Y. Gallais, M. Cazayous, M. A. Méasson, J. S. Wen, Z. J. Xu, G. D. Gu, G. Sangiovanni, Y. Motome, K. Held, A. Sacuto, A. Georges, M. Imada

*この研究の対応する著者

研究成果: Article査読

56 被引用数 (Scopus)

抄録

We reveal the full energy-momentum structure of the pseudogap of underdoped high-Tc cuprate superconductors. Our combined theoretical and experimental analysis explains the spectral-weight suppression observed in the B2g Raman response at finite energies in terms of a pseudogap appearing in the single-electron excitation spectra above the Fermi level in the nodal direction of momentum space. This result suggests an s-wave pseudogap (which never closes in the energy-momentum space), distinct from the d-wave superconducting gap. Recent tunneling and photoemission experiments on underdoped cuprates also find a natural explanation within the s-wave pseudogap scenario.

本文言語English
論文番号107001
ジャーナルPhysical Review Letters
111
10
DOI
出版ステータスPublished - 2013 9月 3
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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