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arXiv 2011.11475cond-mat.supr-concond-mat.str-el
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Hund超导体Li(Fe,Co)As

The Hund's Superconductor Li(Fe,Co)As

H. Miao, Y. L. Wang, J. -X. Yin, J. Zhang, S. Zhang, M. Z. Hasan, R. Yang, X. C. Wang, C. Q. Jin, T. Qian, H. Ding, H. -L. Lee, G. Kotliar

摘要:

我们结合传输,角分辨光电子能谱和扫描隧道光谱研究几个低能量的表现形式的Hund耦合在一个典型的FeSC家庭Li(Fe,Co)As。我们确定的相干-非相干交叉温度和准粒子在正常状态下的有效质量增强的掺杂依赖性。超导态的隧道谱结果支持了Hund金属态的超导电性表现出一个普遍的最大超导能隙与转变温度(2 $Δ_{max}/k_{B}T_{c}$)的关系,它与掺杂水平和$T_{c}$无关。

英文摘要:

We combine transport, angle-resolved photoemission spectroscopy and scanning tunneling spectroscopy to investigate several low energy manifestations of the Hund coupling in a canonical FeSC family Li(Fe,Co)As. We determine the doping dependence of the coherent-incoherent crossover temperature and the quasi-particle effective mass enhancement in the normal state. Our tunneling spectroscopy result in the superconducting state supports the idea that superconductivity emerging from Hund's metal state displays a universal maximal superconducting gap vs transition temperature (2$Δ_{max}/k_{B}T_{c}$) value, which is independent of doping level and $T_{c}$.

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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