Orbital selectivity enhanced by nematic order in FeSe

Abstract

Motivated by the recent low-tempearture experiments on bulk FeSe, we study the electron correlation effects in a multiorbital model for this compound in the nematic phase using the U(1) slave-spin theory. We find that a finite nematic order helps to stabilize an orbital selective Mott phase. Moreover, we propose that when the d- and s-wave bond nematic orders are combined with the ferro-orbital order, there exists a surprisingly large orbital selectivity between the xz and yz orbitals even though the associated band splitting is relatively small. Our results explain the seemingly unusual observation of strong orbital selectivity in the nematic phase of FeSe, and uncover new clues on the nature of the nematic order, and sets the stage to elucidate the interplay between superconductivity and nematicity in iron-based superconductors.

4 pages, 4 figures with 5 pages, 5 figures in supplementary material, published version

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Cited by in corpus (34)

• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Imaging Orbital-selective Quasiparticles in the Hund's Metal State of FeSe
• Anisotropic spin fluctuations in detwinned FeSe
• The Nematic Energy Scale and the Missing Electron Pocket in FeSe
• Local orbital degeneracy lifting as a precursor to an orbital-selective Peierls transition
• Orbital selectivity in electron correlations and superconducting pairing of iron-based superconductors
• Orbital-selective superconductivity in the nematic phase of FeSe
• Is the orbital-selective Mott phase stable against interorbital hopping?
• Pressure induced superconductivity in MnSe
• Room temperature local nematicity in FeSe superconductor
• Thermodynamics of transition to BCS-BEC crossover superconductivity in FeSe${}_{1-x}$S${}_x$
• Cross-band versus intra-band pairing in superconductors: signatures and consequences of the interplay
• Itinerant approach to magnetic neutron scattering of FeSe: effect of orbital selectivity
• Interaction-induced topological phase transition and Majorana edge states in low-dimensional orbital-selective Mott insulators
• Singular magnetic anisotropy in the nematic phase of FeSe
• Small to large Fermi surface transition in a single band model, using randomly coupled ancillas
• FeSe and the missing electron pocket problem
• Anisotropic quasiparticle coherence in nematic BaFe${}_2$As${}_2$ studied with strain-dependent ARPES
• Nematic Fluctuations in an Orbital Selective Superconductor Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Revealing the orbital origins of exotic electronic states with Ti substitution in kagome superconductor CsV3Sb5
• Orbital-Selective High-Temperature Cooper Pairing Developed in the Two-Dimensional Limit
• Nematic spectral signatures of the Hund's metal
• Orbital-selective correlations and renormalized electronic structure in LiFeAs
• Orbital order in a bosonic $p$-band triangular lattice
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Uniaxial stress effect on the electronic structure of quantum materials
• Photoinduced nematic state in FeSe${}_{0.4}$Te${}_{0.6}$
• Unusual band splitting and superconducting gap evolution with sulfur substitution in FeSe
• Orbital selective order and ${\mathbb{Z}}_3$ Potts nematicity from a non-Fermi liquid
• Microscopic Description of Unconventional Nodal Superconductivity in FeSe
• Energy-Resolved Real-Space Imaging of Orbital Nematicity in an Fe-Based Superconductor
• Symmetry-breaking-induced topology in FeSe
• Fe-vacancy ordered Fe4Se5: The insulating parent phase of FeSe superconductor
• Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3