来源 自动抓取
作者 Feiyu Li, Zhenfang Xing, Di Peng, Jie Dou, Ning Guo, Liang Ma, Yulin Zhang, Lingzhen Wang, Jun Luo, Jie Yang, Jian Zhang, Tieyan Chang, Yu-Sheng Chen, Weizhao Cai, Jinguang Cheng, Yuzhu Wang, Yuxin Liu, Tao Luo, Naohisa Hirao, Takahiro Matsuoka, Hirokazu Kadobayashi, Zhidan Zeng, Qiang Zheng, Rui Zhou, Qiaoshi Zeng, Xutang Tao, Junjie Zhang
arXiv / 出版方 https://arxiv.org/abs/2602.23842
PDF https://arxiv.org/pdf/2602.23842
相关度评分 4.473
主分类 cond-mat.supr-con
发布日期 2026-03-02
研究范式 理论研究
样品形态 单晶

摘要

针对Korolev和Talantsev对Li等人《Nature》论文中超导相分数计算的批评，本文作者逐一回应：首先，经实验确认低温尾巴的弱上升源于背景，且未观察到顺磁迈斯纳效应，因此场冷数据可用于计算超导相分数；其次，退磁效应必须基于实际测量磁矩随超导相分数f的变化，而Korolev等错误地将退磁场视为常数，导致其公式低估f约三分之二（因子接近1/3），解释了其计算结果仅为报道值（约62.1%）约三分之一的原因；最后，样品的多种表征（能谱、X射线衍射、核四极共振、扫描透射电镜等）证实为均匀高质量块体单晶，不存在多个离散超导区域。因此，Li等人《Nature》论文中超导相分数的计算方法并未被Korolev等的分析推翻。

材料

方法

关键词

亮点

  • Provides a detailed derivation of the correct formula for superconducting volume fraction in the presence of demagnetization.
  • Shows that the critique's calculation contains a fundamental error by assuming a linear relationship between measured moment and f.

结论

  • The paramagnetic Meissner effect is absent in the data; FC data can be used for volume fraction.
  • The correct self-consistent relation between measured and intrinsic susceptibility yields f ≈ 62.1%, not 22.8%.
  • Korolev and Talantsev's calculation underestimates f by a factor of (1-Nχmeas)/(1-N), which is about 1/3.
  • The sample is a homogeneous single crystal, so the existence of multiple discrete superconducting regions is highly unlikely.

主要论断

  • The weak upturn in low-temperature tail originates from background, not paramagnetic Meissner effect, so field-cooled data are valid for phase fraction calculations.
    • 证据: full_text response to point (1) confirms background origin,abstract states paramagnetic Meissner effect is absent
  • Demagnetization effect must be calculated self-consistently as a function of f; treating demagnetization field as constant underestimates f by a factor ≈1/3.
    • 证据: full_text detailed derivation showing factor (1-Nχmeas)(1-N) ≈ 1/3,abstract and summary_en explain the flaw in Korolev and Talantsev's method
  • The sample is a homogeneous high-quality bulk single crystal, not composed of multiple discrete superconducting regions.
    • 证据: full_text lists EDX, XRD, NQR, STEM characterizations,abstract states various techniques confirm homogeneity

研究流程

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