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	Probing the superconducting energy gap from infrared spectroscopy on a ba0.6k0.4fe2as2 single crystal with t-c=37 k
	Li, G.; Hu, W. Z.; Dong, J.; Li, Z.; Zheng, P.; Chen, G. F.; Luo, J. L.; Wang, N. L.
刊名	Physical review letters
	2008-09-05
卷号	101期号:10页码:4
ISSN号	0031-9007
DOI	10.1103/physrevlett.101.107004
通讯作者	Li, g.()
英文摘要	We performed optical spectroscopy measurement on a superconducting ba0.6k0.4fe2as2 single crystal with t-c = 37 k. formation of the superconducting energy gaps in the far-infrared reflectance spectra below t-c is clearly observed. a flat and close to unity reflectance is observed roughly below 150 cm(-1) for t < t-c, following an s-wave pairing line shape. a more rapid decrease occurs near 200 cm(-1), leading to a peak in the ratio of the reflectance at t << t-c over that for t >= t-c. we determined the absolute value of the penetration depth at 10 k as lambda similar or equal to 2000 +/- 80 angstrom. a spectral weight analysis shows that the ferrell-glover-tinkham sum rule is satisfied at low energy scale, less than 6 delta.
WOS关键词	PENETRATION-DEPTH ; SUM-RULE ; CUPRATE ; TC
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000258975100053
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373672
专题	物理研究所
通讯作者	Li, G.
作者单位	Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, G.,Hu, W. Z.,Dong, J.,et al. Probing the superconducting energy gap from infrared spectroscopy on a ba0.6k0.4fe2as2 single crystal with t-c=37 k[J]. Physical review letters,2008,101(10):4.
APA	Li, G..,Hu, W. Z..,Dong, J..,Li, Z..,Zheng, P..,...&Wang, N. L..(2008).Probing the superconducting energy gap from infrared spectroscopy on a ba0.6k0.4fe2as2 single crystal with t-c=37 k.Physical review letters,101(10),4.
MLA	Li, G.,et al."Probing the superconducting energy gap from infrared spectroscopy on a ba0.6k0.4fe2as2 single crystal with t-c=37 k".Physical review letters 101.10(2008):4.

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