期刊
PHYSICAL REVIEW B
卷 81, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.100512
关键词
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资金
- Alexander von Humboldt Foundation
- NSF of China
Infrared reflectivity measurements on several 122 iron pnictides reveal the existence of two electronic subsystems. The one gapped due to the spin-density-wave transition in the parent materials, such as EuFe2As2, is responsible for superconductivity in the doped compounds, such as Ba(Fe0.92Co0.08)(2)As-2 and Ba(Fe0.95Ni0.05)(2)As-2. Analyzing the dc resistivity and scattering rate of this contribution, a hidden T-2 dependence is found in the normal state. The second subsystem gives rise to incoherent background, present in all 122 compounds, which is basically temperature independent but affected by the superconducting transition.
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