3 research outputs found

    Pairing symmetry and long range pair potential in a weak coupling theory of superconductivity

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    We study the superconducting phase with two component order parameter scenario, such as, dx2−y2+eiθsαd_{x^2-y^2} + e^{i\theta}s_{\alpha}, where α=xy,x2+y2\alpha = xy, x^2+y^2. We show, that in absence of orthorhombocity, the usual dx2−y2d_{x^2-y^2} does not mix with usual sx2+y2s_{x^2+y^2} symmetry gap in an anisotropic band structure. But the sxys_{xy} symmetry does mix with the usual d-wave for θ=0\theta =0. The d-wave symmetry with higher harmonics present in it also mixes with higher order extended ss wave symmetry. The required pair potential to obtain higher anisotropic dx2−y2d_{x^2-y^2} and extended s-wave symmetries, is derived by considering longer ranged two-body attractive potential in the spirit of tight binding lattice. We demonstrate that the dominant pairing symmetry changes drastically from dd to ss like as the attractive pair potential is obtained from longer ranged interaction. More specifically, a typical length scale of interaction ξ\xi, which could be even/odd multiples of lattice spacing leads to predominant s/ds/d wave symmetry. The role of long range interaction on pairing symmetry has further been emphasized by studying the typical interplay in the temperature dependencies of these higher order dd and ss wave pairing symmetries.Comment: Revtex 8 pages, 7 figures embeded in the text, To appear in PR

    The influence of fluorinated MWCNT distribution quality on the mechanical properties of the bulk oriented UHMWPE-based composites

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    The bulk oriented UHMWPE-based composites were obtained. Fluorinated carbon nanotubes were used as a reinforcing filler. The filler contributes in the formation of nanofibrillar supramolecular structure, that in its turn acts as the harder phase in the nanocomposites synthesized. The influence of the quality of the carbon nanotubes distribution on the mechanical properties under tension was shown
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