Abstract
We have performed calculations of the response function for electronic Raman scattering in clean d-wave superconductors including vertex corrections in a conserving approximation and obtain contributions to the B{sub 1g} Raman response that we believe have not been considered previously. These contributions remove the well-known singularity at the threshold energy 2{Delta}{sub 0} for a d-wave superconductor, yielding instead a peak at a slightly higher frequency with an intensity of the same order as the A{sub 1g} response. Our results are in good agreement with experimental data on YBa{sub 2}Cu{sub 3}O{sub 7}. {copyright} {ital 1997} {ital The American Physical Society}
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