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d_{x^2-y^2} Symmetry and the Pairing Mechanism

N. Bulut·D. J. Scalapino
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Abstract

An important question is if the gap in the high temperature cuprates has d_{x^2-y^2} symmetry, what does that tell us about the underlying interaction responsible for pairing. Here we explore this by determining how three different types of electron-phonon interactions affect the d_{x^2-y^2} pairing found within an RPA treatment of the 2D Hubbard model. These results imply that interactions which become more positive as the momentum transfer increases favor d_{x^2-y^2} pairing in a nearly half-filled band.

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N. Bulut, D. J. Scalapino. 1996-09-15. d_{x^2-y^2} Symmetry and the Pairing Mechanism. https://doi.org/10.1103/physrevb.54.14971

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