Reaffirming the dx2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi 1.5Pb0.55Sr1.6La0.4CuO 6+δ

M. Hashimoto; R. H. He; J. P. Testaud; W. Meevasana; R. G. Moore; D. H. Lu; Y. Yoshida; H. Eisaki; T. P. Devereaux; Z. Hussain; Z. X. Shen

doi:10.1103/PhysRevLett.106.167003

Reaffirming the d_x2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi _1.5Pb_0.55Sr_1.6La_0.4CuO _6+δ

M. Hashimoto
, R. H. He
, J. P. Testaud
, W. Meevasana
, R. G. Moore
, D. H. Lu
, Y. Yoshida
, H. Eisaki
, T. P. Devereaux
, Z. Hussain
, Z. X. Shen

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

17 Scopus citations

Abstract

Knowledge of the gap function is important to understand the pairing mechanism for high-temperature (T_c) superconductivity. However, Fourier transform scanning tunneling spectroscopy (FT STS) and angle-resolved photoemission spectroscopy (ARPES) in the cuprates have reported contradictory gap functions, with FT-STS results deviating strongly from a canonical d _x2-y2 form. By applying an "octet model" analysis to autocorrelation ARPES, we reveal that a contradiction occurs because the octet model does not consider the effects of matrix elements and the pseudogap. This reaffirms the canonical d_x2-y2 superconducting gap around the node, which can be directly determined from ARPES. Further, our study suggests that the FT-STS reported fluctuating superconductivity around the node at far above T_c is not necessary to explain the existence of the quasiparticle interference at low energy.

Original language	English
Article number	167003
Journal	Physical Review Letters
Volume	106
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.106.167003
State	Published - Apr 22 2011
Externally published	Yes

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Hashimoto, M., He, R. H., Testaud, J. P., Meevasana, W., Moore, R. G., Lu, D. H., Yoshida, Y., Eisaki, H., Devereaux, T. P., Hussain, Z., & Shen, Z. X. (2011). Reaffirming the d_x2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi _1.5Pb_0.55Sr_1.6La_0.4CuO _6+δ. Physical Review Letters, 106(16), Article 167003. https://doi.org/10.1103/PhysRevLett.106.167003

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title = "Reaffirming the dx2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi 1.5Pb0.55Sr1.6La0.4CuO 6+δ",

abstract = "Knowledge of the gap function is important to understand the pairing mechanism for high-temperature (Tc) superconductivity. However, Fourier transform scanning tunneling spectroscopy (FT STS) and angle-resolved photoemission spectroscopy (ARPES) in the cuprates have reported contradictory gap functions, with FT-STS results deviating strongly from a canonical d x2-y2 form. By applying an {"}octet model{"} analysis to autocorrelation ARPES, we reveal that a contradiction occurs because the octet model does not consider the effects of matrix elements and the pseudogap. This reaffirms the canonical dx2-y2 superconducting gap around the node, which can be directly determined from ARPES. Further, our study suggests that the FT-STS reported fluctuating superconductivity around the node at far above Tc is not necessary to explain the existence of the quasiparticle interference at low energy.",

author = "M. Hashimoto and He, \{R. H.\} and Testaud, \{J. P.\} and W. Meevasana and Moore, \{R. G.\} and Lu, \{D. H.\} and Y. Yoshida and H. Eisaki and Devereaux, \{T. P.\} and Z. Hussain and Shen, \{Z. X.\}",

year = "2011",

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doi = "10.1103/PhysRevLett.106.167003",

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Hashimoto, M, He, RH, Testaud, JP, Meevasana, W, Moore, RG, Lu, DH, Yoshida, Y, Eisaki, H, Devereaux, TP, Hussain, Z & Shen, ZX 2011, 'Reaffirming the d_x2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi _1.5Pb_0.55Sr_1.6La_0.4CuO _6+δ', Physical Review Letters, vol. 106, no. 16, 167003. https://doi.org/10.1103/PhysRevLett.106.167003

TY - JOUR

T1 - Reaffirming the dx2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi 1.5Pb0.55Sr1.6La0.4CuO 6+δ

AU - Hashimoto, M.

AU - He, R. H.

AU - Testaud, J. P.

AU - Meevasana, W.

AU - Moore, R. G.

AU - Lu, D. H.

AU - Yoshida, Y.

AU - Eisaki, H.

AU - Devereaux, T. P.

AU - Hussain, Z.

AU - Shen, Z. X.

PY - 2011/4/22

Y1 - 2011/4/22

N2 - Knowledge of the gap function is important to understand the pairing mechanism for high-temperature (Tc) superconductivity. However, Fourier transform scanning tunneling spectroscopy (FT STS) and angle-resolved photoemission spectroscopy (ARPES) in the cuprates have reported contradictory gap functions, with FT-STS results deviating strongly from a canonical d x2-y2 form. By applying an "octet model" analysis to autocorrelation ARPES, we reveal that a contradiction occurs because the octet model does not consider the effects of matrix elements and the pseudogap. This reaffirms the canonical dx2-y2 superconducting gap around the node, which can be directly determined from ARPES. Further, our study suggests that the FT-STS reported fluctuating superconductivity around the node at far above Tc is not necessary to explain the existence of the quasiparticle interference at low energy.

AB - Knowledge of the gap function is important to understand the pairing mechanism for high-temperature (Tc) superconductivity. However, Fourier transform scanning tunneling spectroscopy (FT STS) and angle-resolved photoemission spectroscopy (ARPES) in the cuprates have reported contradictory gap functions, with FT-STS results deviating strongly from a canonical d x2-y2 form. By applying an "octet model" analysis to autocorrelation ARPES, we reveal that a contradiction occurs because the octet model does not consider the effects of matrix elements and the pseudogap. This reaffirms the canonical dx2-y2 superconducting gap around the node, which can be directly determined from ARPES. Further, our study suggests that the FT-STS reported fluctuating superconductivity around the node at far above Tc is not necessary to explain the existence of the quasiparticle interference at low energy.

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DO - 10.1103/PhysRevLett.106.167003

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ER -

Reaffirming the d_x2-y2 superconducting gap using the autocorrelation angle-resolved photoemission spectroscopy of Bi _1.5Pb_0.55Sr_1.6La_0.4CuO _6+δ

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