Antiferromagnetic order and its interplay with superconductivity in CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$

Abstract

The magnetic order for several compositions of CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$ has been studied by nuclear magnetic resonance (NMR), Mössbauer spectroscopy, and neutron diffraction. Our observations for the Mn-doped 1144 compound are consistent with the hedgehog spin vortex crystal (hSVC) order which has previously been found for Ni-doped $\text{Ca}\text{K}{\text{Fe}}_4{\text{As}}_4$. The hSVC state is characterized by the stripe-type propagation vectors $(\pi 0)$ and $(0\pi )$ just as in the doped 122 compounds. The hSVC state preserves tetragonal symmetry at the Fe site, and only this SVC motif with simple AFM stacking along $\text{c}$ is consistent with all our observations using NMR, Mössbauer spectroscopy, and neutron diffraction. We find that the hSVC state in the Mn-doped 1144 compound coexists with superconductivity (SC), and by combining the neutron scattering and Mössbauer spectroscopy data we can infer a quantum phase transition, hidden under the superconducting dome, associated with the suppression of the AFM transition temperature ($T_{\text{N}}$) to zero for $x\approx 0.01$. In addition, unlike several 122 compounds and Ni-doped 1144, the ordered magnetic moment is not observed to decrease at temperatures below the superconducting transition temperature ($T_{\text{c}}$).

arXiv comment10 pages and 10 figures

References in corpus (33)

• High-temperature superconductivity in iron-based materials
• Nematic order in iron superconductors - who is in the driver's seat?
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Lattice and magnetic instabilities in CaFe2As2: A single crystal neutron diffraction study
• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
• Magnetism in Fe-based superconductors
• Unconventional pairing in the iron arsenide superconductors
• Competing orders in a magnetic field: spin and charge order in the cuprate superconductors
• Space group symmetry, spin-orbit coupling and the low energy effective Hamiltonian for iron based superconductors
• Anisotropic thermodynamic and transport properties of single crystalline CaKFe${}_4$As${}_4$
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Hole-doped BaFe2-xCrxAs2 Crystals: A Case of Non-superconductivity
• Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor
• Antiferromagnetic ordering in the absence of a structural distortion in Ba(Fe{1-x}Mn{x})2As2
• Competing magnetic ground states in non-superconducting Ba(Fe1-xCrx)2As2
• Physical and magnetic properties of Ba(Fe_(1-x)Mn_x)_2As_2 single crystals
• Contrasting Pair-Breaking Effects by Doping Mn and Zn in Ba0.5K0.5Fe2As2
• Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors
• 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
• Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2
• Possible realization of an antiferromagnetic Griffiths phase in Ba[Fe(1-x)Mn(x)](2)As(2)
• Enhancing magnetic stripe order in iron pnictides by RKKY exchange interactions
• The poisoning effect of Mn in LaFe(1-x)Mn(x)AsO(0.89)F(0.11): unveiling a quantum critical point in the phase diagram of iron-based superconductors
• Antiferromagnetic order in CaK(Fe[1-x]Ni[x])4As4 and its interplay with superconductivity
• Hedgehog Spin-vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR
• Coexistence of superconductivity and magnetism in CaK(Fe${}_{1-x}$Ni${}_x$)${}_4$As${}_4$ as probed by ${}^{57}$Fe Mössbauer spectroscopy
• NMR Study of the New Magnetic Superconductor CaK(Fe$0.951Ni0.049)4As4: Microscopic Coexistence of Hedgehog Spin-vortex Crystal and Superconductivity
• Superconductivity and phase diagrams of CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$ single crystals
• Doping effects of Cr on the physical properties of BaFe${}_{1.9-x}$Ni${}_{0.1}$Cr${}_x$As${}_2$
• Prediction of Double-Weyl Points in the Iron-Based Superconductor CaKFe${}_4$As${}_4$
• Superconductivity and magnetic and transport properties of single-crystalline CaK(Fe${}_{1-x}$Cr${}_x$)${}_4$As${}_4$