Nesting Induced Large Magnetoelasticity in the Iron Arsenide Systems

Abstract

A novel feature of the iron arsenides is the magnetoelastic coupling between the long wavelength in-plane strains of the lattice and the collective spin fluctuations of the electrons near the magnetic ordering wavevectors. Here, we study its microscopic origin from an electronic model with nested Fermi pockets and a nominal interaction. We find the couplings diverge with a power-law as the system is tuned to perfect nesting. Furthermore, the theory reveals how nematicity is boosted by nesting. These results are relevant for other systems with nesting driven density wave transitions.

minor content changes from v2; 9 pages, 6 figures

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Cited by in corpus (10)

• Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors
• Nematicity and magnetism in FeSe and other families of Fe-based superconductors
• Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
• Spin-orbital interplay and topology in the nematic phase of iron pnictides
• Orbital mismatch boosting nematic instability in iron-based superconductors
• Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides
• Collapse of critical nematic fluctuations in FeSe under pressure
• Raman scattering as a probe of nematic correlations
• Raman resonance in iron-based superconductors: The magnetic scenario
• Theories for charge-driven nematicity in kagome metals