Journal
PHYSICAL REVIEW B
Volume 81, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.214508
Keywords
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Funding
- Schweizer Nationalfonds (SNF) [200020-119784, 200020-129484]
- NCCR
- Deutsche Forschungsgemeinschaft (DFG) [BE2684/1-3]
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We performed combined infrared reflection and ellipsometry measurements of the in-plane optical response of single crystals of the pnictide high-temperature superconductor BaFe1.87Co0.13As2 with T-c=24.5 K. Our experimental data provide evidence for multiple superconducting energy gaps and can be well described in terms of three isotropic gaps with 2 Delta/k(B)T(c) of 3.1, 4.7, and 9.2. The obtained low-temperature value of the in-plane magnetic penetration depth is 270 nm.
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