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Title: Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK ( Fe 1 - x Ni x ) 4 As 4 Revealed by NMR

Journal Article · · Physical Review Letters

Two ordering states, antiferromagnetism and nematicity, have been observed in most iron-based superconductors (SCs). In contrast to those SCs, the newly discovered SC CaK(Fe1-xNix)4As4 exhibits an antiferromagnetic (AFM) state, called hedgehog spin-vortex crystal structure, without nematic order, providing the opportunity for the investigation into the relationship between spin fluctuations and SC without any effects of nematic fluctuations. Our 75As nuclear magnetic resonance studies on CaK(Fe1-xNix)4As4 (0≤ x ≤ 0.049) revealed that CaKFe4As4 is located close to a hidden hedgehog SVC AFM quantum-critical point (QCP). The magnetic QCP without nematicity in CaK(Fe1-xNix)4As4 highlights the close connection of spin fluctuations and superconductivity in iron-based SCs. The advantage of stoichiometric composition also makes CaKFe4As4 an ideal platform for further detailed investigation of the relationship between magnetic QCP and superconductivity in iron-based SCs without disorder effects.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; GBMF4411
OSTI ID:
1477242
Alternate ID(s):
OSTI ID: 1473998
Report Number(s):
IS-J-9747; PRLTAO
Journal Information:
Physical Review Letters, Vol. 121, Issue 13; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (50)

Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe 4 As 4 journal March 2017
Spin Susceptibility, Phase Diagram, and Quantum Criticality in the Eelctron-Doped High T c Superconductor Ba(Fe 1- x Co x ) 2 As 2 journal January 2009
Anisotropic thermodynamic and transport properties of single-crystalline CaKFe 4 As 4 journal August 2016
Antiferromagnetic order in CaK ( Fe 1 x Ni x ) 4 As 4 and its interplay with superconductivity journal June 2018
Hidden T -Linear Scattering Rate in Ba 0.6 K 0.4 Fe 2 As 2 Revealed by Optical Spectroscopy journal September 2013
Contrasting Spin Dynamics between Underdoped and Overdoped Ba ( Fe 1 x Co x ) 2 As 2 journal January 2010
Coexistence of Cluster Spin Glass and Superconductivity in Ba ( Fe 1 x Co x ) 2 As 2 for 0.060 x 0.071 journal November 2013
Enhancement of Superconductivity near a Nematic Quantum Critical Point journal March 2015
Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor journal February 2018
The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals journal April 1963
Superconducting phases of f -electron compounds journal November 2009
A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides journal March 2014
The pseudogap: friend or foe of high T c ? journal December 2005
Quantum criticality journal February 2011
New-Structure-Type Fe-Based Superconductors: Ca A Fe 4 As 4 ( A = K, Rb, Cs) and Sr A Fe 4 As 4 ( A = Rb, Cs) journal March 2016
Signature of multigap nodeless superconductivity in CaKFe 4 As 4 journal April 2017
NMR study of the new magnetic superconductor CaK ( Fe 0.951 Ni 0.049 ) 4 As 4 : Microscopic coexistence of the hedgehog spin-vortex crystal and superconductivity journal December 2017
Short-range cluster spin glass near optimal superconductivity in Ba Fe 2 x Ni x As 2 journal July 2014
What lies beneath the dome? journal March 2008
Anomalous phonon behavior in superconducting CaKFe 4 As 4 : An optical study journal February 2017
Increasing stripe-type fluctuations in A Fe 2 As 2 ( A = K , Rb, Cs) superconductors probed by As 75 NMR spectroscopy journal March 2018
Anomalous superconducting state in LiFeAs implied by the 75 As Knight shift measurement journal April 2013
FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2 journal August 2010
Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe 1 x Co x As journal September 2015
Magnetic fluctuations and superconducting properties of CaKFe 4 As 4 studied by As 75 NMR journal September 2017
Optimization of the crystal growth of the superconductor CaKFe 4 As 4 from solution in the FeAs CaFe 2 As 2 KFe 2 As 2 system journal June 2017
Antiferromagnetic spin correlations and pseudogaplike behavior in Ca ( Fe 1 x Co x ) 2 As 2 studied by As 75 nuclear magnetic resonance and anisotropic resistivity journal November 2015
Superconductivity in iron compounds journal December 2011
Muon spin rotation study of magnetism and superconductivity in Ba(Fe 1 x Co x ) 2 As 2 single crystals journal November 2012
Iron pnictides as a new setting for quantum criticality journal March 2009
Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe 2 ( As 1 x P x ) 2 journal September 2010
Competing order and nature of the pairing state in the iron pnictides journal July 2010
Emergent Kondo Lattice Behavior in Iron-Based Superconductors A Fe 2 As 2 ( A = K , Rb, Cs) journal April 2016
Gap symmetry and structure of Fe-based superconductors journal October 2011
Enhancement of the Superconducting Gap by Nesting in CaKFe 4 As 4 : A New High Temperature Superconductor journal December 2016
Quantum criticality in electron-doped BaFe2−xNixAs2 journal August 2013
Ising Nematic Quantum Critical Point in a Metal: A Monte Carlo Study journal August 2016
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe 4 As 4 journal September 2017
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Quantum criticality journal January 2005
Superconducting phases of f-electron compounds text January 2009
FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2 text January 2010
Competing order and nature of the pairing state in the iron pnictides text January 2010
Quantum Criticality text January 2011
Superconductivity in Iron Compounds text January 2011
Quantum critical point lying beneath the superconducting dome in iron-pnictides text January 2013
Avoided quantum criticality and magnetoelastic coupling in BaFe$_{2-x}$Ni$_{x}$As$_{2}$ text January 2013
Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor text January 2017
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4 text January 2017
The pseudogap: friend or foe of high Tc? text January 2005

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