Anisotropic superconductivity and Fermi surface reconstruction in the spin-vortex antiferromagnetic superconductor CaK(FeNi)As
arXiv:2009.11246 · doi:10.1103/PhysRevB.103.L060506
Abstract
High critical temperature superconductivity often occurs in systems where an antiferromagnetic order is brought near by slightly modifying pressure or doping. CaKFeAs is a superconducting, stoichiometric iron pnictide compound showing optimal superconducting critical temperature with as large as K. Doping with Ni induces a decrease in and the onset of spin-vortex antiferromagnetic order, which consists of spins pointing inwards to or outwards from alternating As sites on the diagonals of the in-plane square Fe lattice. Here we study the band structure of CaK(FeNi)As (T = 10 K, T = 50 K) using quasiparticle interference with a Scanning Tunneling Microscope (STM) and show that the spin-vortex order induces a Fermi surface reconstruction and a fourfold superconducting gap anisotropy.
arXiv comment5 pages, 4 figures, Supplemental Material on request
References in corpus (50)
- High-temperature superconductivity in iron-based materials
- Hidden Order in the Cuprates
- Gap symmetry and structure of Fe-based superconductors
- The virtual crystal approximation revisited: Application to dielectric and piezoelectric properties of perovskites
- Antiferromagnetic order and spin dynamics in iron-based superconductors
- FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
- Iron-Based Superconductors: current status of materials and pairing mechanism
- Superconducting density of states and vortex cores of 2H-NbS2
- Unconventional pairing in the iron arsenide superconductors
- Momentum dependence of the superconducting gap in BaKFeAs
- Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
- Nodal superconducting gap structure in ferropnictide superconductor BaFe2(As0.7P0.3)2
- Unconventional Anisotropic s-Wave Superconducting Gaps of LiFeAs Iron-Pnictide Superconductor
- Density Functional Application to Strongly Correlated Electron Systems
- Anisotropic thermodynamic and transport properties of single crystalline CaKFeAs
- On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
- A new Majorana platform in an Fe-As bilayer superconductor
- Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor
- Coexistence and competition of the short-range incommensurate antiferromagnetic order with superconductivity in BaFe2-xNixAs2
- Enhancement of the superconducting gap by nesting in CaKFe4As4 - a new high temperature superconductor
- Enhancement of long range correlations in a 2D vortex lattice by incommensurate 1D disorder potential
- Optimization of the Crystal Growth of the Superconductor CaKFeAs from Solution in the FeAs-CaFeAs-KFeAs System
- Nodeless multiband superconductivity in stoichiometric single crystalline CaKFeAs
- Influence of the multiband sign changing superconductivity on the vortex cores and on vortex pinning in the new stoichiometric high Tc CaKFe4As4
- Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors
- Visualizing the microscopic coexistence of spin density wave and superconductivity in underdoped NaFe1-xCoxAs
- Theory of d-density wave viewed from a vertex model and its implications
- Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
- Magnetic fluctuations and superconducting properties of CaKFe4As4 studied by 75As NMR
- Anisotropic but nodeless superconducting gap in the presence of spin density wave in iron-pnictide superconductor NaFe1-xCoxAs
- Evidence for a cos(4φ) Modulation of the Superconducting Energy Gap of Optimally Doped FeTe_{0.6}Se_{0.4} Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy
- Magnetic order without tetragonal-symmetry-breaking in iron arsenides: microscopic mechanism and spin-wave spectrum
- Suppression of antiferromagnetic order and orthorhombic distortion in superconducting Ba(Fe0.961Rh0.039)2As2
- Local superconducting density of states of ErNi2B2C
- Disorder-promoted -symmetric magnetic order in iron-based superconductors
- Competing pairing interactions responsible for the large upper critical field in a stoichiometric iron-based superconductor, CaKFeAs
- Scanning tunneling spectroscopy with superconducting tips of Al
- Antiferromagnetic order in CaK(Fe[1-x]Ni[x])4As4 and its interplay with superconductivity
- Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4
- Hedgehog Spin-vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR
- Coexistence of superconductivity and magnetism in CaK(FeNi)As as probed by Fe Mössbauer spectroscopy
- NMR Study of the New Magnetic Superconductor CaK(Fe$0.951Ni0.049)4As4: Microscopic Coexistence of Hedgehog Spin-vortex Crystal and Superconductivity
- High Tc superconductivity in CaKFeAs in absence of nematic fluctuations
- Robust s+/- pairing in CaK[Fe(1-x)Ni(x)]4As4$ (x = 0 and 0.05) from the response to electron irradiation
- Effect of gap anisotropy on the spin resonance peak in the superconducting state of iron-based materials
- Subdominant -wave interaction in superconducting CaKFeAs?
- Direct visualization of phase separation between superconducting and nematic domains in Co-doped CaFe2As2 close to a first order phase transition
- Methods to simplify cooling of liquid Helium cryostats
- Orbital selectivity of layer resolved tunneling on iron superconductor Ba0.6K0.4Fe2As2
- Magnetism and its coexistence with superconductivity in CaK(FeNi)As: muon spin rotation/relaxation studies