The Study on Hybridized Two-Band Superconductor

Chanpoom, Thaipanya; Seechumsang, J.; Chantrapakajee, S.; Udomsamuthirun, P.

doi:10.1155/2013/528960

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…The mathematical formulation of the Hamiltonian of the system in the two-band model high-temperature IBSC Ba 1−𝑥 Na 𝑥 Fe 2 As 2 which consists of the electron and hole intra-band and inter-band terms is expressed as [17][18][19],…”

Section: Methodsmentioning

confidence: 99%

Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2

Lissanu¹,

Kahsay

Negussie

2023

Ukr. J. Phys.

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This work presents the theoretical investigation of the superconducting and thermodynamic properties of the two-band model high-temperature iron-based superconductor Ba1-xNaxFe2As2. By developing a model Hamiltonian and by employing the well-knownvdouble-time temperature-dependent Green’s function formalism, we have computed the superconducting orderbparameters for the electron and hole intra- and inter-band transitions, superconducting transition temperature, densitiesbof states, and condensation energies. Furthermore, the electronic specific heat and the entropy for electron and hole intra-band transitions have been determined. By using appropriate experimental data and some credible approximations of the parameters in the computed expressions, we have found the phase diagrams of superconducting order parameters versus the temperature, superconducting critical temperature versus the inter-band interaction potential, temperature dependences of the electronic specific heat and entropy for electron and hole intra-band transitions, and densities of states for the electron and hole intra-band transitions as functions of the excitation energy at different values of the temperature. Finally, the phase diagrams of the condensation energy versus the temperature, inter-band pairing potential at T = 0 K versus the condensation energy, and condensation energy versus the superconducting transition temperature (TC) have been drawn. In some of the phase diagrams, the comparison between theoretical and experimental values has been made. The results are in a good agreement with previous findings.

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Section: Methodsmentioning

confidence: 99%

Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2

Lissanu¹,

Kahsay

Negussie

2023

Ukr. J. Phys.

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“…The first group is the iron-pnictides (nitrogen family from the periodic table), that iron makes a zigzag layer with arsenic or phosphorous (Fe-As or Fe-P). The 1111, 111, and 122 classes grouped to iron pnictides [33]. Pnictides have similar magnetic structures but they have different crystal structures and symmetry groups.…”

Section: Iron-based Superconductorsmentioning

confidence: 99%

“…Crystal structure of this type is known as the CeFeSi type, with a tetrahedral P4/nmm space group-FeAs 4 layers, separated with double layer of A ions. Distance between Fe-Fe atoms in different layers is significantly shorter than in 1111 or 122 structure [36] NaFeAs) first reported superconductivity without doping for 111-type materials [33].…”

Section: The 111 Iron-based Superconductor Familymentioning

confidence: 99%

Iron-Based Superconductors

Alloul¹,

Cano²

2023

High Entropy Materials - Microstructures and Properties

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Superconductivity is the phenomenon of vanishing an electrical resistivity of materials below a certain low temperature and superconductors are the materials that show this property. Critical temperature is the temperature below which superconducting state occurs. Based on temperature superconductors can be grouped into high-temperature superconductors and low-temperature superconductors. Based on the mechanism, they can be grouped into conventional and unconventional superconductors. Based on magnetism superconducting materials can also be separated into two groups: type-I and type-II superconductors. In this chapter, we will discuss superconductivity, the Meissner effect, type-I and type-II superconductors, convectional and unconvectional superconductors, heavy fermions, cuprates, iron-based superconductors, and high entropy alloy superconductors. High-entropy alloys (heas) are defined as alloys containing at least five elements with concentrations between 5 and 35 atom%. The atoms randomly distribute on simple crystallographic lattices, where the high entropy of mixing can stabilize disordered solid-solution phases with simple structures. The superconducting behavior of heas is distinct from copper oxide superconductors, iron-based superconductors, conventional alloy superconductors, and amorphous superconductors, suggesting that they can be considered as a new class of superconducting materials.

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“…The gap's equation of the two-band hybridized superconductor of Ref. [3][4] that their Hamiltonian consisted of conduction and other-electron band including BCS-like pairing band and hybridization term was considered. The superconducting gap's equation is [4]…”

Section: Model and Calculationmentioning

confidence: 99%

The Specific Heat Jump of Hybridized Two-Band Superconductor

Seechumsang

Chanpoom

Chantrapakajee

et al. 2013

AMR

Self Cite

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The specific heat jump of the two-band hybridized superconductor was studied. The two-band model is consist of conduction electron band and other-electron band with the upper and lower band of quasi-particle energy spectra occurred by hybridization. The specific heat jump was determined by making the assumption that the conduction electron band having the same energy as other-electron band, and the other-electron band having the energy near the Fermi energy. The analytic formula of specific heat jump of the two-band hybridized superconductor was derived and the effect of hybridization coefficient on the specific heat jump was investigated.

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The Study on Hybridized Two-Band Superconductor

Cited by 7 publications

References 30 publications

Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2

Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2

Iron-Based Superconductors

The Specific Heat Jump of Hybridized Two-Band Superconductor

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