Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe

Abstract

We provide a band structure with low-energy properties consistent with recent photoemission and quantum oscillations measurements on FeSe, assuming mean-field like s and/or d-wave orbital ordering at the structural transition. We show how the resulting model provides a consistent explanation of the temperature dependence of the measured Knight shift and the spin-relaxation rate. Furthermore, the superconducting gap structure obtained from spin fluctuation theory exhibits nodes on the electron pockets, consistent with the 'V'-shaped density of states obtained by tunneling spectroscopy on this material, and the temperature dependence of the London penetration depth. Our studies prove that the recent experimental observations of the electronic properties of FeSe are consistent with orbital order, but leave open the microscopic origin of the unusual band structure of this material.

12 pages, 15 figures, T.B hopping error corrected, d-wave orbital order added, real space hoppings included in tex file

References in corpus (15)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Superconductivity in single-layer films of FeSe with a transition temperature above 100 K
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Orbital-driven nematicity in FeSe
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Emergence of the nematic electronic state in FeSe
• Reconstruction of Band Structure Induced by Electronic Nematicity in an FeSe Superconductor
• Origin of the tetragonal-to-orthorhombic (nematic) phase transition in FeSe: a combined thermodynamic and NMR study
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements
• Superconducting properties of sulfur-doped iron selenide
• Quantum oscillations and upper critical magnetic field of the iron-based superconductor FeSe
• Correlation effects in the tetragonal and collapsed tetragonal phase of CaFe2As2
• Manipulation of gap nodes by uniaxial strain in iron-based superconductors

Cited by in corpus (59)

• Discovery of Orbital-Selective Cooper Pairing in FeSe
• Nematicity, magnetism and superconductivity in FeSe
• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Evidence for unidirectional nematic bond ordering in FeSe
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Electronic nematic susceptibility of iron-based superconductors
• Suppression of orbital ordering by chemical pressure in FeSe1-xSx
• Nematicity and magnetism in FeSe and other families of Fe-based superconductors
• Evolution of the Fermi surface of the nematic superconductors FeSe1-xSx
• Interatomic Coulomb interaction and electron nematic bond order in FeSe
• Anisotropic spin fluctuations in detwinned FeSe
• Highly anisotropic and two-fold symmetric superconducting gap in nematically ordered FeSe${}_{0.93}$S${}_{0.07}$
• Electronic anisotropies revealed by detwinned ARPES measurements of FeSe
• Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors
• Enhancement of Tc by point-like disorder and anisotropic gap in FeSe
• Observation of Dirac Cone Band Dispersion in FeSe Thin Films by Photoemission Spectroscopy
• Spin excitations in a model of FeSe with orbital ordering
• Fermi surface reconstruction in FeSe under high pressure
• Unveiling the hidden nematicity and spin subsystem in FeSe
• Interplay of nematic and magnetic orders in FeSe under pressure
• Spin-excitation anisotropy in the nematic state of detwinned FeSe
• Nematicity, magnetism and superconductivity in FeSe under pressure: Unified explanation based on the self-consistent vertex correction theory
• Evidence for short-range magnetic order in the nematic phase of FeSe from anisotropic in-plane magnetostriction and susceptibility measurements
• Superfluid density and microwave conductivity of FeSe superconductor: ultra-long-lived quasiparticles and extended s-wave energy gap
• Revealing the single electron pocket of FeSe in a single orthorhombic domain
• Orbital mismatch boosting nematic instability in iron-based superconductors
• Strongly enhanced temperature dependence of the chemical potential in FeSe
• Time-reversal symmetry-breaking nematic superconductivity in FeSe
• Nematicity and in-plane anisotropy of superconductivity in $\beta$-FeSe detected by ${}^{77}$Se nuclear magnetic resonance
• Argument on superconductivity pairing mechanism from cobalt impurity doping in FeSe: spin ($s_{\pm }$) or orbital ($s_{++}$) fluctuation
• Topological Vortex Phase Transitions in Iron-Based Superconductors
• The ab initio study of unconventional superconductivity in CeCoIn${}_5$ and FeSe
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Theoretical study of impurity-induced magnetism in FeSe
• Evidence of nodal gap structure in the basal plane of the FeSe superconductor
• Singular magnetic anisotropy in the nematic phase of FeSe
• Mechanism for nematic superconductivity in FeSe
• $k_z$ selective scattering within Quasiparticle Interference measurements of FeSe
• Bounds on Nanoscale Nematicity in Single-Layer FeSe/SrTiO${}_3$
• FeSe and the missing electron pocket problem
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Origin of doping-induced suppression and reemergence of magnetism in LaFeAsO${}_{1-x}$H${}_x$
• Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
• Nematic magnetoelastic effect contrasted between Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ and FeSe
• Thermodynamic electric quadrupole moments of nematic phases from first-principles calculation
• Quantum Transitions of Nematic Phases in a Spin-$1$ Bilinear-Biquadratic Model and Their Implications for FeSe
• Inhomogeneous Knight shift in vortex cores of superconducting FeSe
• Fermi surface, pressure-induced antiferromagnetic order, and superconductivity in FeSe
• Strong Landau-quantization effects in high-magnetic-field superconductivity of a two-dimensional multiple-band metal near the Lifshitz transition
• Anisotropy of the DC conductivity due to orbital-selective spin fluctuations in the nematic phase of iron superconductors
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Influence of orbital nematic order on spin responses in Fe-based superconductors
• Crystalline anisotropy induces a second antiferromagnetic phase in the absence of SDW in the heavily hydrogen-doped LaFeAsO${}_{1-x}$H${}_x$ $(x\sim 0.5)$
• Magnetic excitations in the normal and nematic phases of iron pnictides
• Orbitally resolved superconductivity in real space: FeSe
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe
• Microscopic Description of Unconventional Nodal Superconductivity in FeSe
• Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe