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arXiv 0812.0977cond-mat.supr-con
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点接触Andreev反射法研究TbFeAsO $_{0.9}$ F $_{0.1}$超导能隙结构

Investigation of Superconducting Gap Structure in TbFeAsO$_{0.9}$F$_{0.1}$ using Point Contact Andreev Reflection

K. A. Yates, K. Morrison, Jennifer A Rodgers, George BS Penny, Jan-Willem G Bos, J. Paul Attfield, L. F. Cohen

摘要:

用点接触Andreev反射光谱法测量了TbFeAsO $_{0.9}$ F $_{0.1}$(T $_{c}$(on)= 50 K)的体样品。光谱显示明确的证据,多个间隙样功能加上存在高偏差的肩膀。通过测量光谱作为温度的函数与金和超导铌尖,我们建立了间隙的功能与超导序参量在这种材料。我们讨论是否定义明确的零偏置电导峰,我们很少观察到的是与节点超导序参量。

英文摘要:

Bulk samples of TbFeAsO$_{0.9}$F$_{0.1}$ (T$_{c}$(on) = 50K) were measured by point contact Andreev reflection spectroscopy. The spectra show unambiguous evidence for multiple gap-like features plus the presence of high bias shoulders. By measuring the spectra as a function of temperature with both gold and superconducting niobium tips, we establish that the gap-like features are associated with superconducting order parameter in this material. We discuss whether the well defined zero bias conductance peak that we observe infrequently is associated with a nodal superconducting order parameter.

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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