Dynamic spin-response function of the high-temperature Bi_2Sr_2CaCu_2O_8+δ superconductor from angle-resolved photoemission spectra
Morr, D. K.
Norman, M. R.
Fretwell, H. M.
Campuzano, J. C.
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Publisher:American Physical Society
Citation:U. Chatterjee et al, "Dynamic spin-response function of the high-temperature Bi_2Sr_2CaCu_2O_8+δ superconductor from angle-resolved photoemission spectra," Physical Review B 75, no. 17 (2007), doi:10.1103/PhysRevB.75.172504
We introduce a formalism for calculating dynamic response functions using experimental single-particle Green’s functions. As an illustration of this procedure, we estimate the dynamic spin-response of the cuprate superconductor Bi_2Sr_2CaCu_2O_8+δ. We find good agreement with superconducting state neutron data, in particular, the (π,π) resonance with its unusual “hourglass” shaped dispersion. We anticipate that our formalism will also be useful in interpreting results from other spectroscopies, such as optical and Raman responses.
Rights:©2007 The American Physical Society
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