Phys. Rev. B 69, 144501 (2004) [6 pages]Hot spots and transition from d-wave to another pairing symmetry in the electron-doped cuprate superconductorsReceived 4 December 2003; published 2 April 2004 We present a simple theoretical explanation for a transition from d-wave to another superconducting pairing observed in the electron-doped cuprates. The dx2-y2 pairing potential Δ, which has the maximal magnitude and opposite signs at the hot spots on the Fermi surface, becomes suppressed with the increase of electron doping, because the hot spots approach the Brillouin zone diagonals, where Δ vanishes. Then, dx2-y2 pairing is replaced by either singlet s-wave or triplet p-wave pairing. We argue in favor of the latter and propose experiments to uncover it. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.144501
DOI:
10.1103/PhysRevB.69.144501
PACS:
74.72.-h, 74.20.Rp, 74.20.Mn
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