Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ: A photon-energy-dependent angle-resolved photoemission study

M. Hashimoto; R. H. He; I. M. Vishik; F. Schmitt; R. G. Moore; D. H. Lu; Y. Yoshida; H. Eisaki; Z. Hussain; T. P. Devereaux; Z. X. Shen

doi:10.1103/PhysRevB.86.094504

Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ: A photon-energy-dependent angle-resolved photoemission study

M. Hashimoto, R. H. He, I. M. Vishik, F. Schmitt, R. G. Moore, D. H. Lu, Y. Yoshida, H. Eisaki, Z. Hussain, T. P. Devereaux, Z. X. Shen

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Abstract

The interplay between superconductivity and the pseudogap is an important aspect of cuprate physics. However, the nature of the pseudogap remains controversial, in part because different experiments have suggested different gap functions. Here we present a photon-energy-dependent angle-resolved photoemission spectroscopy (ARPES) study on Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ. We find that antinodal ARPES spectra at low photon energies are dominated by background signals which can lead to a misevaluation of the spectral gap size. Once background is properly accounted for, independent of photon energy, the antinodal spectra robustly show two coexisting features at different energies dominantly attributed to the pseudogap and superconductivity, as well as an overall spectral gap which deviates from a simple d-wave form. These results support the idea that the spectral gap is distorted due to the competition between the pseudogap and superconductivity.

Original language	English
Article number	094504
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.86.094504
State	Published - Sep 4 2012
Externally published	Yes

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Hashimoto, M., He, R. H., Vishik, I. M., Schmitt, F., Moore, R. G., Lu, D. H., Yoshida, Y., Eisaki, H., Hussain, Z., Devereaux, T. P., & Shen, Z. X. (2012). Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ: A photon-energy-dependent angle-resolved photoemission study. Physical Review B - Condensed Matter and Materials Physics, 86(9), Article 094504. https://doi.org/10.1103/PhysRevB.86.094504

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title = "Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ: A photon-energy-dependent angle-resolved photoemission study",

abstract = "The interplay between superconductivity and the pseudogap is an important aspect of cuprate physics. However, the nature of the pseudogap remains controversial, in part because different experiments have suggested different gap functions. Here we present a photon-energy-dependent angle-resolved photoemission spectroscopy (ARPES) study on Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ. We find that antinodal ARPES spectra at low photon energies are dominated by background signals which can lead to a misevaluation of the spectral gap size. Once background is properly accounted for, independent of photon energy, the antinodal spectra robustly show two coexisting features at different energies dominantly attributed to the pseudogap and superconductivity, as well as an overall spectral gap which deviates from a simple d-wave form. These results support the idea that the spectral gap is distorted due to the competition between the pseudogap and superconductivity.",

author = "M. Hashimoto and He, {R. H.} and Vishik, {I. M.} and F. Schmitt and Moore, {R. G.} and Lu, {D. H.} and Y. Yoshida and H. Eisaki and Z. Hussain and Devereaux, {T. P.} and Shen, {Z. X.}",

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doi = "10.1103/PhysRevB.86.094504",

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Hashimoto, M, He, RH, Vishik, IM, Schmitt, F, Moore, RG, Lu, DH, Yoshida, Y, Eisaki, H, Hussain, Z, Devereaux, TP & Shen, ZX 2012, 'Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ: A photon-energy-dependent angle-resolved photoemission study', Physical Review B - Condensed Matter and Materials Physics, vol. 86, no. 9, 094504. https://doi.org/10.1103/PhysRevB.86.094504

Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ: A photon-energy-dependent angle-resolved photoemission study. / Hashimoto, M.; He, R. H.; Vishik, I. M. et al.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 9, 094504, 04.09.2012.

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

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T1 - Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ

T2 - A photon-energy-dependent angle-resolved photoemission study

AU - Hashimoto, M.

AU - He, R. H.

AU - Vishik, I. M.

AU - Schmitt, F.

AU - Moore, R. G.

AU - Lu, D. H.

AU - Yoshida, Y.

AU - Eisaki, H.

AU - Hussain, Z.

AU - Devereaux, T. P.

AU - Shen, Z. X.

PY - 2012/9/4

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N2 - The interplay between superconductivity and the pseudogap is an important aspect of cuprate physics. However, the nature of the pseudogap remains controversial, in part because different experiments have suggested different gap functions. Here we present a photon-energy-dependent angle-resolved photoemission spectroscopy (ARPES) study on Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ. We find that antinodal ARPES spectra at low photon energies are dominated by background signals which can lead to a misevaluation of the spectral gap size. Once background is properly accounted for, independent of photon energy, the antinodal spectra robustly show two coexisting features at different energies dominantly attributed to the pseudogap and superconductivity, as well as an overall spectral gap which deviates from a simple d-wave form. These results support the idea that the spectral gap is distorted due to the competition between the pseudogap and superconductivity.

AB - The interplay between superconductivity and the pseudogap is an important aspect of cuprate physics. However, the nature of the pseudogap remains controversial, in part because different experiments have suggested different gap functions. Here we present a photon-energy-dependent angle-resolved photoemission spectroscopy (ARPES) study on Bi 1.5Pb 0.55Sr 1.6La 0.4CuO 6+δ. We find that antinodal ARPES spectra at low photon energies are dominated by background signals which can lead to a misevaluation of the spectral gap size. Once background is properly accounted for, independent of photon energy, the antinodal spectra robustly show two coexisting features at different energies dominantly attributed to the pseudogap and superconductivity, as well as an overall spectral gap which deviates from a simple d-wave form. These results support the idea that the spectral gap is distorted due to the competition between the pseudogap and superconductivity.

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VL - 86

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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M1 - 094504

ER -

Superconductivity distorted by the coexisting pseudogap in the antinodal region of Bi _1.5Pb _0.55Sr _1.6La _0.4CuO _6+δ: A photon-energy-dependent angle-resolved photoemission study

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