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Higher anisotropic d-wave symmetry in cuprate superconductors

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arxiv cond-mat/9907231 v1 pith:S4LK46SV submitted 1999-07-16 cond-mat.supr-con

classification cond-mat.supr-con
keywords d-wavehighersymmetryanisotropicsuperconductorsattractionbalatskybinding
verification ladder T0 review T1 audit T2 compute T3 formal
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We derive a pair potential from tight binding further neighbours attraction that leads to superconducting gap symmetry similar to that of the phenomenological spin fluctuation theory of high temperature superconductors (Monthoux, Balatsky, Pines, Phys. Rev. Lett. {\bf 67}, 3448). We show that higher anisotropic d-wave than the simpliest d-wave symmetry is one of the important ingredients responsible for higher BCS characteristic ratio.

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