选定的高 TC 氧化物超导体的转变温度与公式质量：室温超导电性的阶跃闭合

IF 0.8 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-09-05 DOI:10.1007/s40010-024-00889-5

Mahendra Prasad, A. M. Parmeswaran, Kaman Singh

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摘要

超导体的转变温度 Tc 标志着超导性的开始。我们很想了解 Tc 随经过深入研究的高锝氧化物超导体的公式质量 (FM) 的变化情况，以观察这些氧化物超导体的 Tc 和 FM 之间是否存在任何相关性。有趣的是，我们观察到 8 种不同高锝超导体的 Tc /Fm 比值趋于一致，它们的转变温度≥ 90 K，比值为 0.136，偏差为 14%。Tc 小于 90 K 的其他超导体和铋基超导体的比值相差很大。将转变温度推断到 25 °C，高锝氧化物超导体的式质量 FM 变为 2239，在 Tc ≥ 90 K 的不同材料中仅有 14% 的偏差。有关 YBCO 超导体的实验工作正在进行中，实验结果将作为本研究的延伸予以公布。

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Transition Temperature versus Formula Mass of Selected High-TC Oxide Superconductors: A Step Closure to Room Temperature Superconductivity

The transition temperature T_c of the superconductor signals the onset of superconductivity. We were curious to see the variation of T_c with the formula mass (F_M) of well-studied high-T_c oxide superconductors to observe whether there exists any correlation between T_c and F_M of these oxide superconductors. Interestingly, it is observed that the ratios of T_c /F_m of 8 different high-T_c superconductors which exhibit transition temperature ≥ 90 K, converge to show a ratio of 0.136 with a 14% deviation. Other superconductors and bismuth-based which have T_c less than 90 K differ significantly. Extrapolating the transition temperature to 25 °C, a formula mass F_M of high-T_c oxide superconductor turns to be 2239 with only 14% deviation in different materials which have T_c ≥ 90 K. This means if oxide superconductors of formula mass 2239 are synthesized, then that materials could exhibit room-temperature superconductivity. The experimental work on YBCO superconductors is underway and results will be communicated essentially an extension of the present work.