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arXiv 0810.1564cond-mat.supr-concond-mat.str-el
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条纹超导体理论

Theory of the striped superconductor

Erez Berg, Eduardo Fradkin, Steven A. Kivelson

摘要:

我们定义了一个不同的物质相,一个“对密度波”(PDW),其中超导序参量$ϕ$作为位置的函数周期性地变化,使得当在质心位置上平均时,$ϕ$的所有分量都相同地消失。具体来说,我们研究了最简单的,单向PDW,“条纹超导体”,我们认为这可能是在失败的高温超导体,La $_{2-x}$ Ba $_x$ CuO $_4$中观察到的一些壮观的实验异常的核心。我们提出了一个可解的微观模型与强电子-电子相互作用,支持PDW基态。我们还讨论了,在朗道理论的水平上,PDW和其他序参量之间的耦合的性质,这种状态的异常灵敏度的起源和一些后果淬火无序。

英文摘要:

We define a distinct phase of matter, a "pair density wave" (PDW), in which the superconducting order parameter $ϕ$ varies periodically as a function of position such that when averaged over the center of mass position, all components of $ϕ$ vanish identically. Specifically, we study the simplest, unidirectional PDW, the "striped superconductor," which we argue may be at the heart of a number of spectacular experimental anomalies that have been observed in the failed high temperature superconductor, La$_{2-x}$ Ba$_x$CuO$_4$. We present a solvable microscopic model with strong electron-electron interactions which supports a PDW groundstate. We also discuss, at the level of Landau theory, the nature of the coupling between the PDW and other order parameters, and the origins and some consequences of the unusual sensitivity of this state to quenched disorder.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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