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

doi:10.1103/PhysRevLett.111.107001

Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi₂Sr₂CaCuO_8+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

Waseda Research Institute for Science and Engineering

Research output: Contribution to journal › Article

53 Citations (Scopus)

Abstract

We reveal the full energy-momentum structure of the pseudogap of underdoped high-T_c cuprate superconductors. Our combined theoretical and experimental analysis explains the spectral-weight suppression observed in the B_2g 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.

Original language	English
Article number	107001
Journal	Physical Review Letters
Volume	111
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.111.107001
Publication status	Published - 2013 Sep 3

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.111.107001

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Sakai, S., Blanc, S., Civelli, M., Gallais, Y., Cazayous, M., Méasson, M. A., Wen, J. S., Xu, Z. J., Gu, G. D., Sangiovanni, G., Motome, Y., Held, K., Sacuto, A., Georges, A., & Imada, M. (2013). Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi₂Sr₂CaCuO_8+δ Superconductors: Evidence of an s-wave structure for the pseudogap. Physical Review Letters, 111(10), [107001]. https://doi.org/10.1103/PhysRevLett.111.107001

Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi₂Sr₂CaCuO_8+δ Superconductors : Evidence of an s-wave structure for the pseudogap. / Sakai, S.; Blanc, S.; Civelli, M.; Gallais, Y.; Cazayous, M.; Méasson, M. A.; Wen, J. S.; Xu, Z. J.; Gu, G. D.; Sangiovanni, G.; Motome, Y.; Held, K.; Sacuto, A.; Georges, A.; Imada, M.

In: Physical Review Letters, Vol. 111, No. 10, 107001, 03.09.2013.

Research output: Contribution to journal › Article

Sakai, S, Blanc, S, Civelli, M, Gallais, Y, Cazayous, M, Méasson, MA, Wen, JS, Xu, ZJ, Gu, GD, Sangiovanni, G, Motome, Y, Held, K, Sacuto, A, Georges, A & Imada, M 2013, 'Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi₂Sr₂CaCuO_8+δ Superconductors: Evidence of an s-wave structure for the pseudogap', Physical Review Letters, vol. 111, no. 10, 107001. https://doi.org/10.1103/PhysRevLett.111.107001

Sakai, S. ; Blanc, S. ; Civelli, M. ; Gallais, Y. ; Cazayous, M. ; Méasson, M. A. ; Wen, J. S. ; Xu, Z. J. ; Gu, G. D. ; Sangiovanni, G. ; Motome, Y. ; Held, K. ; Sacuto, A. ; Georges, A. ; Imada, M. / Raman-scattering measurements and theory of the energy-momentum spectrum for Underdoped Bi₂Sr₂CaCuO_8+δ Superconductors : Evidence of an s-wave structure for the pseudogap. In: Physical Review Letters. 2013 ; Vol. 111, No. 10.

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abstract = "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.",

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AU - Blanc, S.

AU - Civelli, M.

AU - Gallais, Y.

AU - Cazayous, M.

AU - Méasson, M. A.

AU - Wen, J. S.

AU - Xu, Z. J.

AU - Gu, G. D.

AU - Sangiovanni, G.

AU - Motome, Y.

AU - Held, K.

AU - Sacuto, A.

AU - Georges, A.

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AB - 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.

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