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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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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

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

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

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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doi = "10.1103/PhysRevLett.111.107001",

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AU - Sakai, S.

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.

AU - Imada, M.

PY - 2013/9/3

Y1 - 2013/9/3

N2 - 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.

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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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

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