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Spin-lattice coupling in iron-pnictide superconductors

The magnetic moment in the parent phase of the iron-pnictide superconductors varies with composition even when the nominal charge of iron is unchanged. We propose the spin-lattice coupling due to the magneto-volume effect as the primary origin of this effect, and formulate a Landau theory to describ...

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Hauptverfasser: Egami, Takeshi (VerfasserIn) , Fine, Boris V. (VerfasserIn) , Singh, D. J. (VerfasserIn) , Parshall, D. (VerfasserIn) , de la Cruz, C. (VerfasserIn) , Dai, P. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2010
In: Physica. C, Superconductivity and its applications
Year: 2010, Jahrgang: 470, Pages: S294-S295
ISSN:1873-2143
DOI:10.1016/j.physc.2009.11.167
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physc.2009.11.167
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0921453409008843
Volltext
Verfasserangaben:T. Egami, B.V. Fine, D.J. Singh, D. Parshall, C. de la Cruz, P. Dai

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520 |a The magnetic moment in the parent phase of the iron-pnictide superconductors varies with composition even when the nominal charge of iron is unchanged. We propose the spin-lattice coupling due to the magneto-volume effect as the primary origin of this effect, and formulate a Landau theory to describe the dependence of the moment to the Fe-As layer separation. We then compare the superconductive critical temperature of doped iron pnictides to the local moment predicted by the theory, and suggest that the spin-phonon coupling may play a role in the superconductivity of this compound. 
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