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Emergent Magnetic Degeneracy in Iron Pnictides due to the Interplay between Spin-Orbit Coupling and Quantum Fluctuations

TitleEmergent Magnetic Degeneracy in Iron Pnictides due to the Interplay between Spin-Orbit Coupling and Quantum Fluctuations
Publication TypeJournal Article
Year of Publication2018
AuthorsChristensen, MH, Orth, PP, Andersen, BM, Fernandes, RM
JournalPhysical Review Letters
Volume121
Pagination057001
Date Published07
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000440143200008
Keywordshigh-temperature superconductivity, order, physics
Abstract

es place close to this proliferation of near-degenerate magnetic states. In this Letter, we employ a renormalization group calculation to show that such a behavior naturally arises due to the effects of spin-orbit coupling on the quantum magnetic fluctuations. Formally, the enhanced magnetic degeneracy near the quantum critical point is manifested as a stable Gaussian fixed point with a large basin of attraction. Implications of our findings to the superconductivity of the iron pnictides are also discussed.

DOI10.1103/PhysRevLett.121.057001
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Alternate JournalPhys. Rev. Lett.