Itinerant scenario for Fe-pnictides: comparison with quantum Monte Carlo

Abstract

Recent applications of Quantum Monte Carlo (QMC) technique to Fe-based superconductors opened a way to directly verify the applicability of the itinerant scenario for these systems. Fe-based superconductors undergo various instabilities upon lowering temperature (magnetism, superconductivity, nematicity/orbital order), and one can check whether the hierarchy of instabilities obtained within the itinerant approach is the same as in unbiased QMC simulations. In a recent paper [arXiv:1512:08523] the authors considered the simplest two-band model with interaction tailored to favor orbital order. The type of the orbital order found in QMC is different from the one found in earlier itinerant analysis. We report the results of our calculations within the itinerant scenario and argue that they are in perfect agreement with QMC.

arXiv comment8 pages, 4 figures

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Cited by in corpus (7)

• Low-energy microscopic models for iron-based superconductors: a review
• Superconductivity and Nematic Fluctuations in a model of FeSe monolayers: A Determinant Quantum Monte Carlo Study
• Collapse of critical nematic fluctuations in FeSe under pressure
• Displacement and annihilation of Dirac gap-nodes in d-wave iron-based superconductors
• Competing spin density wave, collinear, and helical magnetism in Fe1+xTe
• Orbital order from the on-site orbital attraction
• Surface Nematic Order in Iron Pnictides