Electronic Raman scattering in superconducting cuprates

A. V. Chubukov; D. K. Morr; G. Blumberg

doi:10.1016/S0038-1098(99)00358-0

Electronic Raman scattering in superconducting cuprates

A. V. Chubukov, D. K. Morr, G. Blumberg

Physics and Astronomy (Twin Cities)

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

17 Scopus citations

Abstract

We show that the novel features observed in Raman experiments on optimally doped and underdoped Bi-2212 compounds in B_1g geometry can be explained by a strong fermionic self-energy due to the interaction with spin fluctuations. We compute the Raman intensity R(ω) both above and below T_c, and show that in both cases R(ω) progressively deviates, with decreasing doping, from that in a Fermi-gas due to increasing contribution from the fermionic self-energy. We also show that the final state interaction increases with decreasing doping and gradually transforms the 2Δ peak in the superconducting state into a pseudo resonance mode below 2Δ. We argue that these results agree well with the experimental data for Bi-2212.

Original language	English (US)
Pages (from-to)	183-188
Number of pages	6
Journal	Solid State Communications
Volume	112
Issue number	4
DOIs	https://doi.org/10.1016/S0038-1098(99)00358-0
State	Published - Sep 17 1999

Bibliographical note

Funding Information:
It is our pleasure to thank T. Devereaux, R. Gatt, R. Joynt, M. V. Klein, A. Millis, H. Monien, D. Pines and J. Schmalian for useful conversations. The research was supported by NSF grant DMR-9629839 (A.C.) and by the NSF cooperative agreement DMR91-20000 through STCS (D.M. and G.B.).

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title = "Electronic Raman scattering in superconducting cuprates",

abstract = "We show that the novel features observed in Raman experiments on optimally doped and underdoped Bi-2212 compounds in B1g geometry can be explained by a strong fermionic self-energy due to the interaction with spin fluctuations. We compute the Raman intensity R(ω) both above and below Tc, and show that in both cases R(ω) progressively deviates, with decreasing doping, from that in a Fermi-gas due to increasing contribution from the fermionic self-energy. We also show that the final state interaction increases with decreasing doping and gradually transforms the 2Δ peak in the superconducting state into a pseudo resonance mode below 2Δ. We argue that these results agree well with the experimental data for Bi-2212.",

author = "Chubukov, {A. V.} and Morr, {D. K.} and G. Blumberg",

note = "Funding Information: It is our pleasure to thank T. Devereaux, R. Gatt, R. Joynt, M. V. Klein, A. Millis, H. Monien, D. Pines and J. Schmalian for useful conversations. The research was supported by NSF grant DMR-9629839 (A.C.) and by the NSF cooperative agreement DMR91-20000 through STCS (D.M. and G.B.).",

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AU - Chubukov, A. V.

AU - Morr, D. K.

AU - Blumberg, G.

N1 - Funding Information: It is our pleasure to thank T. Devereaux, R. Gatt, R. Joynt, M. V. Klein, A. Millis, H. Monien, D. Pines and J. Schmalian for useful conversations. The research was supported by NSF grant DMR-9629839 (A.C.) and by the NSF cooperative agreement DMR91-20000 through STCS (D.M. and G.B.).

PY - 1999/9/17

Y1 - 1999/9/17

N2 - We show that the novel features observed in Raman experiments on optimally doped and underdoped Bi-2212 compounds in B1g geometry can be explained by a strong fermionic self-energy due to the interaction with spin fluctuations. We compute the Raman intensity R(ω) both above and below Tc, and show that in both cases R(ω) progressively deviates, with decreasing doping, from that in a Fermi-gas due to increasing contribution from the fermionic self-energy. We also show that the final state interaction increases with decreasing doping and gradually transforms the 2Δ peak in the superconducting state into a pseudo resonance mode below 2Δ. We argue that these results agree well with the experimental data for Bi-2212.

AB - We show that the novel features observed in Raman experiments on optimally doped and underdoped Bi-2212 compounds in B1g geometry can be explained by a strong fermionic self-energy due to the interaction with spin fluctuations. We compute the Raman intensity R(ω) both above and below Tc, and show that in both cases R(ω) progressively deviates, with decreasing doping, from that in a Fermi-gas due to increasing contribution from the fermionic self-energy. We also show that the final state interaction increases with decreasing doping and gradually transforms the 2Δ peak in the superconducting state into a pseudo resonance mode below 2Δ. We argue that these results agree well with the experimental data for Bi-2212.

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JO - Solid State Communications

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Electronic Raman scattering in superconducting cuprates

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