Interplay of nematic and magnetic orders in FeSe under pressure

Abstract

We offer an explanation for the recently observed pressure-induced magnetic state in the iron-chalcogenide FeSe based on \textit{ab initio} estimates for the pressure evolution of the most important Coulomb interaction parameters. We find that an increase of pressure leads to an overall decrease mostly in the nearest-neighbor Coulomb repulsion, which in turn leads to a reduction of the nematic order and the generation of magnetic stripe order. We treat the concomitant effects of band renormalization and the induced interplay of nematic and magnetic order in a self-consistent way and determine the generic topology of the temperature-pressure phase diagram, and find qualitative agreement with the experimentally determined phase diagram.

13 pages, 6 figs

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Cited by in corpus (20)

• Nematicity, magnetism and superconductivity in FeSe
• The key ingredients of the electronic structure of FeSe
• Exotic Superconducting States in FeSe-based Materials
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Singular magnetic anisotropy in the nematic phase of FeSe
• Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multi-orbital correlated electron systems
• Hund's metal crossover and superconductivity in the 111 family of iron-based superconductors
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Basic electronic properties of iron selenide under variation of structural parameters
• Fermi surface, pressure-induced antiferromagnetic order, and superconductivity in FeSe
• Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations
• Unveiling the quasiparticle behaviour in the pressure-induced high-$T_c$ phase of an iron-chalcogenide superconductor
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe
• Critical point of the transition between $s_{\pm }$ and $s_{++}$ states of a two-band superconductor with nonmagnetic impurities
• Symmetry-breaking-induced topology in FeSe
• Fragile pressure-induced magnetism in FeSe superconductors with a thickness reduction