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Superconductivity in zigzag CuO chains
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DOI：10.1103/PhysRevB.76.214505.png)
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摘要
En 中文
Superconductivity has recently been discovered in Pr2Ba4Cu7O15-delta with a maximum T-c of about 15 K. Since the CuO planes in this material are believed to be insulating, it has been proposed that the superconductivity occurs in the double (or zigzag) CuO chain layer. On phenomenological grounds, we propose a theoretical interpretation of the experimental results in terms of a phase for the zigzag chain, labeled by C1S3/2. This phase has a gap in the relative charge mode and a partial gap in the relative spin mode. It has gapless uniform charge and spin excitations and can have a divergent superconducting susceptibility, even for repulsive interactions. A microscopic model for the zigzag CuO chain is proposed, and on the basis of density matrix renormalization group and bosonization studies, we adduce evidence that supports our proposal.
Keyword:
SPIN CORRELATIONS
PR2BA4CU7O15-DELTA
CROSSOVER
LADDERS
LIQUID
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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分享收藏分享收藏Strongly reduced gap in the zigzag spin chain with a ferromagnetic interchain coupling.png)
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OAAI分享收藏Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr2Ba4Cu7O15-δPHYSICAL REVIEW BOAAI
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OAAI分享收藏Antiferromagnetic spin ladders: Crossover between spin S=1/2 and S=1 chainsPHYSICAL REVIEW BOAAI
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