Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR

doi:10.1103/PhysRevLett.121.137204

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

Abstract

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(Fe_1-xNi_x)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(Fe_1-xNi_x)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(Fe_1-xNi_x)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.

Authors:

Ding, Q. -P. ^[1]; Meier, W. R. ^[1]; Cui, J. ^[1]; Xu, M. ^[1]; Böhmer, A. E. ^[1]; Bud’ko, S. L. ^[1]; Canfield, P. C. ^[1]; Furukawa, Y. ^[1]

Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Publication Date:: 2018-09-26

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1477242

Alternate Identifier(s):: OSTI ID: 1473998

Report Number(s):: IS-J-9747
Journal ID: ISSN 0031-9007; PRLTAO

Grant/Contract Number:: AC02-07CH11358; GBMF4411

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 121; Journal Issue: 13; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Ding, Q. -P., Meier, W. R., Cui, J., Xu, M., Böhmer, A. E., Bud’ko, S. L., Canfield, P. C., and Furukawa, Y. Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR.  United States: N. p., 2018. 
        Web.  doi:10.1103/PhysRevLett.121.137204.

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                    Ding, Q. -P., Meier, W. R., Cui, J., Xu, M., Böhmer, A. E., Bud’ko, S. L., Canfield, P. C., & Furukawa, Y. Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR.  United States.  doi:10.1103/PhysRevLett.121.137204.

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                    Ding, Q. -P., Meier, W. R., Cui, J., Xu, M., Böhmer, A. E., Bud’ko, S. L., Canfield, P. C., and Furukawa, Y. Wed .  
        "Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR".  United States.  doi:10.1103/PhysRevLett.121.137204.  https://www.osti.gov/servlets/purl/1477242.

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@article{osti_1477242,

  title        = {Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR},

  author       = {Ding, Q. -P. and Meier, W. R. and Cui, J. and Xu, M. and Böhmer, A. E. and Bud’ko, S. L. and Canfield, P. C. and Furukawa, Y.},

  abstractNote = {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.},

  doi          = {10.1103/PhysRevLett.121.137204},

  journal      = {Physical Review Letters},

  number       = 13,

  volume       = 121,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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DOI: 10.1103/PhysRevLett.121.137204

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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

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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

Avoided Quantum Criticality and Magnetoelastic Coupling in ${BaFe}_{2 - x} {Ni}_{x} {As}_{2}$
journal, June 2013

Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with the Superconducting State of ${BaFe}_{2 - x} {Ni}_{x} {As}_{2}$
journal, June 2012

Unified Phase Diagram for Iron-Based Superconductors
journal, October 2017

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 $0.060 \leq x \leq 0.071$
journal, November 2013

Odd and Even Modes of Neutron Spin Resonance in the Bilayer Iron-Based Superconductor ${CaKFe}_{4} {As}_{4}$
journal, June 2018

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 ${}^{75}{As}$ 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 ${}^{75}{As}$ 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 ${}^{75}{As}$ 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

Structural and Magnetic Phase Transitions near Optimal Superconductivity in ${{BaFe}_{2} ({As}_{1 - x} P_{x})}_{2}$
journal, April 2015

Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped ${BaFe}_{2} ({As}_{1 - x} P_{x})_{2}$
journal, September 2010

Nematic Quantum Critical Fluctuations in ${BaFe}_{2 - x} {Ni}_{x} {As}_{2}$
journal, October 2016

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