Probing superconducting energy gap from infrared spectroscopy on a Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ single crystal with T$_c$=37 K

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dc.creatorLi, G.
dc.creatorHu, W. Z.
dc.creatorDong, J.
dc.creatorLi, Z.
dc.creatorZheng, P.
dc.creatorChen, G. F.
dc.creatorLuo, J. L.
dc.creatorWang, N. L.
dc.date2008-07-07
dc.date.accessioned2026-07-07T10:00:34Z
dc.date.available2026-07-07T10:00:34Z
dc.descriptionWe performed optical spectroscopy measurement on a superconducting Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ single crystal with T$_c$=37 K. Formation of the superconducting energy gaps in the far-infared reflectance spectra below T$_c$ is clearly observed. The gap amplitudes match well with the two distinct superconducting gaps observed in angle-resolved photoemission spectroscopy experiments on different Fermi surfaces. We determined absolute value of the penetration depth at 10 K as $λ\simeq2000 Å$. A spectral weight analysis shows that the Ferrell-Glover-Timkham sum rule is satisfied at low energy scale, less than 6$Δ$.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0807.1094
dc.identifierhttp://arxiv.org/abs/0807.1094
dc.identifierPhys. Rev. Lett. 101, 107004 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.107004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168355
dc.subjectSuperconductivity
dc.titleProbing superconducting energy gap from infrared spectroscopy on a Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ single crystal with T$_c$=37 K
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