Composite operators for BCS Superconductor
classification
❄️ cond-mat
keywords
compositeoperatoroperatorssuperconductorapproachcooperderivationexamples
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The new form of the composite operator generalizing the Cooper pairs for a BCS superconductor is introduced. The approach is similar to the derivation of the composite operator of the odd - frequency superconductors. The examples of the $d_{x^2-y^2}-,~d_{xy}-$ and $p-$ wave composite operators for a 2D $t-J$ model are given.
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