Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study

J. Mesot; M. R. Norman; H. Ding; M. Randeria; J. C. Campuzano; A. Paramekanti; H. M. Fretwell; A. Kaminski; T. Takeuchi; T. Yokoya; T. Sato; T. Takahashi; T. Mochiku; K. Kadowaki

doi:10.1103/PhysRevLett.83.840

Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study

J. Mesot, M. R. Norman, H. Ding, M. Randeria, J. C. Campuzano, A. Paramekanti, H. M. Fretwell, A. Kaminski, T. Takeuchi, T. Yokoya, T. Sato, T. Takahashi, T. Mochiku, K. Kadowaki

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270 Citations (Scopus)

Abstract

Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple cosk_x−cosk_y form, which suggests an increasing importance of long range interactions as the insulator is approached.

Original language	English
Pages (from-to)	840-843
Number of pages	4
Journal	Physical Review Letters
Volume	83
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.83.840
Publication status	Published - Jan 1 1999
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.83.840

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Mesot, J., Norman, M. R., Ding, H., Randeria, M., Campuzano, J. C., Paramekanti, A., Fretwell, H. M., Kaminski, A., Takeuchi, T., Yokoya, T., Sato, T., Takahashi, T., Mochiku, T., & Kadowaki, K. (1999). Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study. Physical Review Letters, 83(4), 840-843. https://doi.org/10.1103/PhysRevLett.83.840

Mesot, J, Norman, MR, Ding, H, Randeria, M, Campuzano, JC, Paramekanti, A, Fretwell, HM, Kaminski, A, Takeuchi, T, Yokoya, T, Sato, T, Takahashi, T, Mochiku, T & Kadowaki, K 1999, 'Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study', Physical Review Letters, vol. 83, no. 4, pp. 840-843. https://doi.org/10.1103/PhysRevLett.83.840

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T2 - A doping dependent photoemission study

AU - Mesot, J.

AU - Norman, M. R.

AU - Ding, H.

AU - Randeria, M.

AU - Campuzano, J. C.

AU - Paramekanti, A.

AU - Fretwell, H. M.

AU - Kaminski, A.

AU - Takeuchi, T.

AU - Yokoya, T.

AU - Sato, T.

AU - Takahashi, T.

AU - Mochiku, T.

AU - Kadowaki, K.

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N2 - Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple coskx−cosky form, which suggests an increasing importance of long range interactions as the insulator is approached.

AB - Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple coskx−cosky form, which suggests an increasing importance of long range interactions as the insulator is approached.

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Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study

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