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28 March 2024
 
  » arxiv » cond-mat/0312280

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Suppression of Superconductivity in YBCO/LCMO Superlattices
F. Chen ; B. Gorshunov ; G. Cristiani ; H.-U. Habermeier ; M. Dressel ;
Date 11 Dec 2003
Subject Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el
AbstractThe competition of superconductivity and magnetism in superlattices composed of alternating YBa$_2$Cu$_3$O$_{7-d}$ and La$_{0.67}$Ca$_{0.33}$MnO$_{3}$ thin films is investigated using low-energy optical spectroscopy. The thickness of the superconducting YBCO layers is varied from 30 nm to 20 nm while the thickness of the magnetic LCMO layers is kept constant at 20 nm. We clearly observe that the superconducting condensate density in the superconducting state of superlattice is drastically reduced by the magnetic subsystem which may be connected with proximity effects that distort the gap symmetry and thus suppress superconductivity.
Source arXiv, cond-mat/0312280
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