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Microscopic Study of Superconductivity in Presence of External Magnetic Field in Iron Pnictide Superconductors.

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Title: Microscopic Study of Superconductivity in Presence of External Magnetic Field in Iron Pnictide Superconductors.
Authors: Barik, Santosh Kumar1 (AUTHOR), Sahoo, Basanta Kumar2 (AUTHOR) sahoo75.cmt@gmail.com, Panda, Bibekananda3 (AUTHOR)
Source: Journal of Low Temperature Physics. Feb2026, Vol. 222 Issue 1, p1-19. 19p.
Subjects: Magnetic field effects, Zeeman effect, Superconductivity, Density of states, Iron-based superconductors, Superconducting transitions, Mean field theory
Abstract: We study the effect of an external magnetic field on superconducting properties within a mean-field theoretical framework motivated by iron-based superconductors. Inclusion of the magnetic field is introduced solely by Zeeman splitting of quasi-particle energies, corresponding to the Pauli-limited regime, valid in orbital magnetic effects being neglected. Based on the Zubarev Green’s function formalism, the self-consistent equations of the superconducting (SC) order parameter, quasi-particle spectrum, and density of states (DOS) are found. The issue of dependence of the SC gap, DOS and transition temperature on the degree of magnetic field and temperature is analysed in the framework. The findings indicate that the superconductivity was suppressed monotonically with magnetic field and the quasi-particle DOS was subject to Zeeman splitting and its associated changes. The current methodology is not meant to give a quantitative and material-specific description of iron-based superconductors; instead, it provides a qualitative description of the superconducting behaviour of Pauli-limited systems at the mean-field level. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="AR" term="%22Barik%2C+Santosh+Kumar%22">Barik, Santosh Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sahoo%2C+Basanta+Kumar%22">Sahoo, Basanta Kumar</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> sahoo75.cmt@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Panda%2C+Bibekananda%22">Panda, Bibekananda</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Low+Temperature+Physics%22">Journal of Low Temperature Physics</searchLink>. Feb2026, Vol. 222 Issue 1, p1-19. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+field+effects%22">Magnetic field effects</searchLink><br /><searchLink fieldCode="DE" term="%22Zeeman+effect%22">Zeeman effect</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Density+of+states%22">Density of states</searchLink><br /><searchLink fieldCode="DE" term="%22Iron-based+superconductors%22">Iron-based superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Superconducting+transitions%22">Superconducting transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Mean+field+theory%22">Mean field theory</searchLink>
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  Data: We study the effect of an external magnetic field on superconducting properties within a mean-field theoretical framework motivated by iron-based superconductors. Inclusion of the magnetic field is introduced solely by Zeeman splitting of quasi-particle energies, corresponding to the Pauli-limited regime, valid in orbital magnetic effects being neglected. Based on the Zubarev Green’s function formalism, the self-consistent equations of the superconducting (SC) order parameter, quasi-particle spectrum, and density of states (DOS) are found. The issue of dependence of the SC gap, DOS and transition temperature on the degree of magnetic field and temperature is analysed in the framework. The findings indicate that the superconductivity was suppressed monotonically with magnetic field and the quasi-particle DOS was subject to Zeeman splitting and its associated changes. The current methodology is not meant to give a quantitative and material-specific description of iron-based superconductors; instead, it provides a qualitative description of the superconducting behaviour of Pauli-limited systems at the mean-field level. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10909-026-03373-z
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      – Code: eng
        Text: English
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      – SubjectFull: Magnetic field effects
        Type: general
      – SubjectFull: Zeeman effect
        Type: general
      – SubjectFull: Superconductivity
        Type: general
      – SubjectFull: Density of states
        Type: general
      – SubjectFull: Iron-based superconductors
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      – SubjectFull: Superconducting transitions
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      – SubjectFull: Mean field theory
        Type: general
    Titles:
      – TitleFull: Microscopic Study of Superconductivity in Presence of External Magnetic Field in Iron Pnictide Superconductors.
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            NameFull: Barik, Santosh Kumar
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            NameFull: Sahoo, Basanta Kumar
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              Text: Feb2026
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              Y: 2026
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