Origin of gap anisotropy in spin fluctuation models of the iron pnictides

T. A. Maier; S. Graser; D. J. Scalapino; P. J. Hirschfeld

doi:10.1103/PhysRevB.79.224510

Origin of gap anisotropy in spin fluctuation models of the iron pnictides

T. A. Maier, S. Graser, D. J. Scalapino, P. J. Hirschfeld

Computational Sciences & Engineering Div

Research output: Contribution to journal › Article › peer-review

126 Scopus citations

Abstract

We discuss the large gap anisotropy found for the A1g (s wave) state in random-phase approximation spin fluctuation and functional renormalization-group calculations and show how the simple arguments leading to isotropic sign-switched s -wave states in these systems need to be supplemented by a consideration of pair scattering within Fermi-surface sheets and between the individual electron sheets as well. In addition, accounting for the orbital makeup of the states on the Fermi surface is found to be crucial.

Original language	English
Article number	224510
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	79
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.79.224510
State	Published - Jun 10 2009

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10.1103/PhysRevB.79.224510

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abstract = "We discuss the large gap anisotropy found for the A1g (s wave) state in random-phase approximation spin fluctuation and functional renormalization-group calculations and show how the simple arguments leading to isotropic sign-switched s -wave states in these systems need to be supplemented by a consideration of pair scattering within Fermi-surface sheets and between the individual electron sheets as well. In addition, accounting for the orbital makeup of the states on the Fermi surface is found to be crucial.",

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AU - Hirschfeld, P. J.

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Origin of gap anisotropy in spin fluctuation models of the iron pnictides

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