Theory for Magnetism and Triplet Superconductivity in LiFeAs

Abstract

Superconducting pnictides are widely found to feature spin-singlet pairing in the vicinity of an antiferromagnetic phase, for which nesting between electron and hole Fermi surfaces is crucial. LiFeAs differs from the other pnictides by (i) poor nesting properties and (ii) unusually shallow hole pockets. Investigating magnetic and pairing instabilities in an electronic model that incorporates these differences, we find antiferromagnetic order to be absent. Instead we observe almost ferromagnetic fluctuations which drive an instability toward spin-triplet p-wave superconductivity.

arXiv commentPublished version

References in corpus (20)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• High-temperature superconductivity in iron-based materials
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Superconductivity without magnetism in LiFeAs
• Doping-dependent Phase Diagram of LaO{\it M}As ({\it M}=V--Cu) and Electron-type Superconductivity near Ferromagnetic Instability
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Three orbital model for the iron-based superconductors
• Tight-binding models for the new iron based superconductor materials
• Sensitivity of the superconducting state and magnetic susceptibility to key aspects of electronic structure in ferropnictides
• Model for the Magnetic Order and Pairing Channels in Fe Pnictide Superconductors
• The Synthesis and Characterization of LiFeAs and NaFeAs
• Even Parity, Orbital Singlet and Spin Triplet Pairing for Superconducting $La(O_{1-x}{F}_x)FeAs$
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Orbital-weight redistribution triggered by spin order in the pnictides
• Pairing symmetry and properties of iron-based high temperature superconductors
• Symmetry of superconducting states with two orbitals on a tetragonal lattice: application to $La{O}_{1-x}{F}_{x}FeAs$

Cited by in corpus (46)

• Superconductivity in Iron Compounds
• Gap symmetry and structure of Fe-based superconductors
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Functional Renormalization Group for multi-orbital Fermi Surface Instabilities
• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• Unconventional Anisotropic s-Wave Superconducting Gaps of LiFeAs Iron-Pnictide Superconductor
• Crossover from weak to strong pairing in unconventional superconductors
• Spin fluctuations in LiFeAs observed by neutron scattering
• Effects of correlation in LiFeAs
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Fishtail effect and vortex dynamics in LiFeAs single crystals
• The superconducting gaps in LiFeAs: Joint study of specific heat and ARPES
• Orbital selective Fermi surface shifts and mechanism of high T${}_c$ superconductivity in correlated AFeAs (A=Li,Na)
• Gap Symmetry in KFe_2As_2 and cos 4θgap component in LiFeAs
• Incommensurate magnetic excitations in superconducting LiFeAs
• Probing the Unconventional Superconducting State of LiFeAs by Quasiparticle Interference
• Superconductivity from repulsion in LiFeAs: novel s-wave symmetry and potential time-reversal symmetry breaking
• Signature of the Leggett mode in the A1g Raman response: from MgB2 to iron-based superconductors
• Time of life as it is in LiFeAs
• Superconducting gap in LiFeAs from three-dimensional spin-fluctuation pairing calculations
• Sign inversion in the superconducting order parameter of LiFeAs inferred from Bogoliubov quasiparticle interference
• Band-structure effects on superconductivity in Hubbard models
• Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
• Spin Josephson effect with a single superconductor
• Correlation-enhanced odd-parity inter-orbital singlet pairing in the iron-pnictide superconductor LiFeAs
• Magnetic order in orbital models of the iron pnictides
• 75As NMR-NQR study in superconducting LiFeAs
• Effect of Li-deficiency impurities on the electron-overdoped LiFeAs superconductor
• Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs
• Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs
• Incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering
• The upper critical field of NaFe${}_{1-x}$Co${}_x$As superconductors
• Substrate-supported triplet superconductivity in Dirac semimetals
• Molecular Beam Epitaxy Growth of Superconducting LiFeAs Film on SrTiO3(001) Substrate
• Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement
• Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives
• Interband Quasiparticle Scattering in Superconducting LiFeAs Reconciles Photoemission and Tunneling Measurements
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Cooper Pairing in Insulating Valence Band in Fe-Based Superconductors
• Spectroscopic evidence of nematic fluctuations in LiFeAs
• Modelling the electronic structure and magnetic properties of LiFeAs and FeSe using hybrid-exchange density functional theory
• Theoretical approach to resonant inelastic x-ray scattering in iron-based superconductors at the energy scale of the superconducting gap
• Defect states in LiFeAs as seen by low temperature scanning tunneling microscopy and spectroscopy
• Signatures of unconventional pairing in near-vortex electronic structure of LiFeAs
• Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
• Hole-$s_{\pm }$ State Induced by Coexisting Ferro- and Aniferromagnetic and Aniferro-orbital Fluctuations in the Iron Pnictides