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<p>In this work, the theoretical study of magnetic strength of pairing interaction in two-band model high-temperature iron-based superconductors Ba(Fe<sub>1−x</sub>Co<sub>x</sub>)<sub>2</sub>As<sub>2</sub> and Ba<sub>1−x</sub>Na<sub>x</sub>Fe<sub>2</sub>As<sub>2</sub> is conducted. With zero applied external magnetic field, the two-band model iron-based superconductors Ba(Fe<sub>1−x</sub>Co<sub>x</sub>)<sub>2</sub>As<sub>2</sub> and Ba<sub>1-x</sub>Na<sub>x</sub>Fe<sub>2</sub>As<sub>2</sub> transition from the normal state to the superconducting state at a transition temperature of 22&#xa0;K and 34&#xa0;K, respectively. The theoretical study of critical magnetic fields, H<sub>C2</sub>(T), Ginzburg–Landau coherence lengths, ζ<sub>GL</sub>(T), Ginzburg–Landau penetration depths, and Ginzburg–Landau characteristic parameter for the iron-based superconductors Ba (Fe<sub>1−x</sub>Co<sub>x</sub>)<sub>2</sub>As<sub>2</sub> and Ba<sub>1-x</sub>Na<sub>x</sub>Fe<sub>2</sub>As<sub>2</sub> from the two-band model has been conducted using the well-known phenomenological Ginzburg–Landau (GL) equation. In addition, the angular dependences of the critical magnetic field have been examined. The symmetry axis versus temperature, the angular dependence of the critical magnetic fields, H<sub>C2</sub> versus angle θ, the characteristic parameters, versus temperature, and the phase diagrams of the parallel and perpendicular critical magnetic fields, HC2 (T), the coherence lengths of GL, GL coherence lengths, ζ<sub>GL</sub> (T), and the penetration depth of GL have been plotted by taking into account the available experimental values in the expressions obtained. The observations and my findings agree.</p>

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Magnetic strength of pairing interaction in a two-band model high-temperature iron-based superconductor Ba1-yRy (Fe1−xTx)2As2 (R = Na and T = Co)

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • Teklie Lissanu Tegegne

摘要

In this work, the theoretical study of magnetic strength of pairing interaction in two-band model high-temperature iron-based superconductors Ba(Fe1−xCox)2As2 and Ba1−xNaxFe2As2 is conducted. With zero applied external magnetic field, the two-band model iron-based superconductors Ba(Fe1−xCox)2As2 and Ba1-xNaxFe2As2 transition from the normal state to the superconducting state at a transition temperature of 22 K and 34 K, respectively. The theoretical study of critical magnetic fields, HC2(T), Ginzburg–Landau coherence lengths, ζGL(T), Ginzburg–Landau penetration depths, and Ginzburg–Landau characteristic parameter for the iron-based superconductors Ba (Fe1−xCox)2As2 and Ba1-xNaxFe2As2 from the two-band model has been conducted using the well-known phenomenological Ginzburg–Landau (GL) equation. In addition, the angular dependences of the critical magnetic field have been examined. The symmetry axis versus temperature, the angular dependence of the critical magnetic fields, HC2 versus angle θ, the characteristic parameters, versus temperature, and the phase diagrams of the parallel and perpendicular critical magnetic fields, HC2 (T), the coherence lengths of GL, GL coherence lengths, ζGL (T), and the penetration depth of GL have been plotted by taking into account the available experimental values in the expressions obtained. The observations and my findings agree.