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arXiv 1008.2019cond-mat.supr-con
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超导SmFeAsO $1-x$ F $x$单晶的局域准粒子态密度:自旋介导配对的证据

Local quasiparticle density of states of superconducting SmFeAsO$1-x$F$x$ single crystals: Evidence for spin-mediated pairing

Y. Fasano, I. Maggio-Aprile, N. D. Zhigadlo, S. Katrych, J. Karpinski, Ø. Fischer

摘要:

本文用扫描隧道谱研究了微米级SmFeAsO $_{1-x}$ F $_{x}$单晶的局域准粒子态密度。光谱特征类似于那些铜酸盐,特别是一个dip-hump-like的结构开发的能量大于间隙,可以归因于准粒子的耦合到一个集体模式,很可能是一个共振自旋模式。我们的研究揭示了集体模的能量随着对强度的增加而减小。我们的研究结果支持自旋涨落介导的配对在pnictides。

英文摘要:

We probe the local quasiparticles density-of-states in micron-sized SmFeAsO$_{1-x}$F$_{x}$ single-crystals by means of Scanning Tunnelling Spectroscopy. Spectral features resemble those of cuprates, particularly a dip-hump-like structure developed at energies larger than the gap that can be ascribed to the coupling of quasiparticles to a collective mode, quite likely a resonant spin mode. The energy of the collective mode revealed in our study decreases when the pairing strength increases. Our findings support spin-fluctuation-mediated pairing in pnictides.

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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