Theory of optical conductivity in detwinned YBa$_2$Cu$_3$O$_{y}$

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We study theoretically the chain and in-plane optical conductivities of detwinned YBa$_2$Cu$_3$O$_{y}$. We elaborate that the chain is superconducting for $y>6.67$ while insulating for $y<6.67$ due to the competition between the plane-chain coupling and the antiferromagnetic order, corresponding to a superconductor-insulator transition. Stemming also from the coupling between the plane and chain, a new peak emerges at a low frequency in the in-plane spectra in the superconducting state, while it disappears in the normal state. Our scenario accounts satisfactorily for very recent experiments.
4 pages, 3 figures

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/114685

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0608207
 http://arxiv.org/abs/cond-mat/0608207

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arXiv