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arXiv 2602.11014cond-mat.supr-con
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层间相关 Disorder 与 Cuprates 中的结构化层间隧道效应

Vertically Correlated Disorder and Structured Interlayer Tunneling in Cuprates

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine(乌克兰国家科学院 B.维尔金低温物理与工程学院研究所);Smart Materials Group, Mads Clausen Institute, University of Southern Denmark, Sønderborg(南丹麦大学马兹·克拉斯恩学院智能材料研究组)

E. Yu. Beliayev, Y. K. Mishra, I. G. Mirzoiev, V. V. Andrievskii, A. V. Terekhov

AI总结:

研究通过垂直相关 Disorder 调制层间隧道效应,揭示其在铜基超导体中调控维度和层间相干性的机制。

摘要:

铜基超导体在平面内显示出强大的电子相关性,但层间相干性却异常脆弱。我们提出,即使弱的垂直相关 Disorder(源于间隙氧阶、孪生边界、扩展应变场或缺陷固定的电荷纹理)也能对层间隧道幅值 t(z) 产生层依赖性的调制。由于裸露的层间耦合本质上很小,这种调制会产生有效的多通道 c 轴电动力学响应,与多组分约瑟夫森等离子体共振、非单调 c 轴电阻率、双层磁谱重量再分布以及场增强的垂直CDW相关性一致。我们提出一个现象学框架,其中 Disorder 的组织方式而非其大小决定了有效层间耦合及其电动力学特征。这一观点统一了多种铜基超导体中的 c 轴异常,表明通过控制垂直 Disorder 相关性为调节高 Tc 超导体的维度和层间相干性提供了可行的途径。

英文摘要:

Cuprate superconductors display robust in-plane electronic correlations but exceptionally fragile interlayer coherence. We suggest that even weak vertically correlated disorder (arising from interstitial-oxygen staging, twin boundaries, extended strain fields, or defect-pinned charge textures) can impose a layer-dependent modulation of the interlayer tunneling amplitude t(z). Because the bare interlayer coupling is intrinsically small, such modulations generate an effectively multichannel c-axis electrodynamic response, consistent with multi-component Josephson plasma resonances, nonmonotonic c-axis resistivity, redistribution of bilayer magnetic spectral weight, and field-enhanced vertical CDW correlations. We propose a phenomenological framework in which the organization of disorder, rather than its magnitude, governs the effective interlayer coupling and its electrodynamic signatures. This viewpoint unifies diverse c-axis anomalies across several cuprate families, suggesting that controlling vertical disorder correlations offers a viable pathway for tuning dimensionality and interlayer coherence in high-Tc superconductors.

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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