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Short-range spin- and pair-correlations: a variational wave-function

Short-range spin- and pair-correlations: a variational wave-function,10.1016/j.synthmet.2003.09.016,Synthetic Metals,D. van der Marel

Short-range spin- and pair-correlations: a variational wave-function  
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A many-body wave-function is postulated, which is sufficiently general to describe superconducting pair-correlations, and/or spin-correlations, which can occur either as long-range order or as finite-range correlations. The proposed wave-function appears to summarize some of the more relevant aspects of the rich phase-diagram of the high-Tc cuprates. Some of the states represented by this wave-function are reviewed: for superconductivity in the background of robust anti-ferromagnetism, the Cooper-pairs are shown to be a superposition of spinquantum numbers S=0 and 1. If the anti-ferromagnetism is weak, a continuous super-symmetric rotation is identified connecting s-wave superconductivity to anti-ferromagnetism.
Journal: Synthetic Metals - SYNTHET METAL , vol. 141, no. 1, pp. 149-154, 2004
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