dx2−y2symmetry and the pairing mechanism

1996/09/15 by N. Bulut, Niyazi Bulut, D. J. Scalapino · 5 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat

paper · pdf · doi:10.1103/physrevb.54.14971

9 pages and 2 eps figs, uses revtex with epsf, in press, PRB

arxiv created 1996/09/15 · openalex publication_date 1996/12/01 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28

Abstract

An important question is, if the gap in the high-temperature cuprates has d_x²\ensuremath-y² 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_x²\ensuremath-y² pairing found within a random phase approximation treatment of the two-dimensional Hubbard model. These results imply that interactions which become more positive as the momentum transfer increases favor d_x²\ensuremath-y² pairing in a nearly half-filled band.

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