Optical and Hidden Transport Properties of BaFe$_{1.91}$Ni$_{0.09}$As$_{2}$ Film
| Autor: | A. V. Muratov, Aleena Anna Thomas, Stefan Richter, Giovanni Ummarino, Yurii A Aleshchenko, Ruben Hühne |
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| Rok vydání: | 2020 |
| Předmět: |
Coupling
Superconductivity Materials science Condensed matter physics Component (thermodynamics) Condensed Matter - Superconductivity Infrared spectroscopy FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Superconductivity (cond-mat.supr-con) Ellipsometry Scattering rate Condensed Matter::Superconductivity 0103 physical sciences General Materials Science Cuprate 010306 general physics 0210 nano-technology Spectroscopy |
| DOI: | 10.48550/arxiv.2012.01962 |
| Popis: | Optical spectroscopy was used to study the electrodynamics and hidden transport properties of a BaFe1.91Ni0.09As2 thin superconducting (SC) film. We analyzed the normal state data using a Drude–Lorentz model with two Drude components: one narrow (D1) and another broad one (D2). In the SC state, two gaps with 2 Δ 0 ( 2 ) / k B T c = 1.9 –2.0 and 2 Δ 0 ( 1 ) / k B T c = 4.0 –4.3 are formed from the narrow component D1 while the broad component D2 remains ungapped. The calculated total DC resistivity of the film and the low-temperature scattering rate for the narrow Drude component show a hidden Fermi-liquid behavior. The change of total electron–boson coupling (λ tot) and representative energy (Ω0) in the normal state with respect to the SC state is typical of other iron-based materials as well as high-temperature superconducting (HTSC) cuprates. |
| Databáze: | OpenAIRE |
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