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RKKY coupled local-moment magnetism in NaFe 1–x Cu x As

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [2]
  1. Northwestern Univ., Evanston, IL (United States); OSTI
  2. Northwestern Univ., Evanston, IL (United States)
  3. Rice Univ., Houston, TX (United States); Zhejiang Univ., Hangzhou (China)
  4. Rice Univ., Houston, TX (United States)
+ Show Author Affiliations

A central question in a large class of strongly correlated electron systems, including heavy fermion compounds and iron pnictides, is the identification of different phases and their origins. It has been shown that the antiferromagnetic (AFM) phase in some heavy fermion compounds is induced by Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between localized moments, and that the competition between this interaction and Kondo effect is responsible for quantum criticality. However, conclusive experimental evidence of the RKKY interaction in pnictides is lacking. Here, using high resolution 23Na NMR measurements on lightly Cu-doped metallic single crystals of NaFe1–x Cux As (x ≈ 0.01) and numerical simulation, we show direct evidence of the RKKY interaction in this pnictide system. Aided by computer simulation, we identify the 23Na NMR satellite resonances with the RKKY oscillations of spin polarization at Fe sites. Our 23Na spin-lattice and spin-spin relaxation data exhibit a signature of an itinerant and inhomogeneous AFM phase in this system, accompanied by a simulation of Cu-induced perturbation to the ordered moments on the Fe sites. Our NMR results indicate coexistence of local and itinerant magnetism in lightly Cu-doped NaFe1–x Cux As.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States); Northwestern Univ., Evanston, IL (United States); Rice Univ., Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Robert A. Welch Foundation
Grant/Contract Number:
FG02-05ER46202; FG02-05ER46248; SC0012311
OSTI ID:
1979666
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 14 Vol. 104; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (54)

Genesis of Coexisting Itinerant and Localized Electrons in Iron Pnictides journal April 2009
Nuclear magnetic relaxation in weakly ferro-and antiferromagnetic metals journal July 1974
Hyperfine studies of the static and dynamic susceptibilities of Kondo systems journal January 1977
A Mott insulator continuously connected to iron pnictide superconductors journal December 2016
Quantum criticality in heavy-fermion metals journal March 2008
Structural absorption by barbule microstructures of super black bird of paradise feathers journal January 2018
Quantum phases driven by strong correlations journal December 2020
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Host NMR in dilute magnetic alloys: the spatial variation of the spin polarization journal September 1974
Electronic reconstruction through the structural and magnetic transitions in detwinned NaFeAs journal July 2012
Evolution of the multiband Ruderman–Kittel–Kasuya–Yosida interaction: application to iron pnictides and chalcogenides journal March 2013
Indirect Exchange Coupling of Nuclear Magnetic Moments by Conduction Electrons journal October 1954
Stripe antiferromagnetism and disorder in the Mott insulator NaFe 1 − x Cu x As ( x ≲ 0.5 ) journal February 2020
Spin dynamics in NaFeAs and NaFe 0.53 Cu 0.47 As probed by resonant inelastic x-ray scattering journal February 2021
Conduction-electron spin density around Fe impurities in Cu above and below the Kondo temperature journal January 1976
Magnetic exchange in disordered metals journal January 1988
63Cuand89YNMRstudy of an optimally dopedYBa2Cu3O6.94single crystal journal November 1997
Stretched exponential relaxation arising from a continuous sum of exponential decays journal November 2006
Similar glassy features in the L 139 a NMR response of pure and disordered La 1.88 Sr 0.12 CuO 4 journal July 2008
Structural and magnetic phase transitions in Na 1 − δ FeAs journal July 2009
Effects of cobalt doping and three-dimensionality in BaFe 2 As 2 journal September 2009
Itinerant nature of magnetism in iron pnictides: A first-principles study journal March 2010
Local magnetic inhomogeneities in Ba ( Fe 1 − x Ni x ) 2 As 2 as seen via A 75 s NMR journal October 2010
Na 23 and As 75 NMR study of antiferromagnetism and spin fluctuations in NaFeAs single crystals journal April 2011
RKKY interaction in the spin-density-wave phase of iron-based superconductors journal October 2011
Varying Eu2+magnetic order by chemical pressure in EuFe2(As1−xPx)2 journal October 2011
Magnetic field dependence of spin-lattice relaxation in the s ± state of Ba 0.67 K 0.33 Fe 2 As 2 journal May 2012
Spin pairing and penetration depth measurements from nuclear magnetic resonance in NaFe 0.975 Co 0.025 As journal May 2013
Phase diagram and physical properties of NaFe 1 − x Cu x As single crystals journal September 2013
ARPES study of the effect of Cu substitution on the electronic structure of NaFeAs journal December 2013
NMR study of electronic correlations in Mn-doped Ba(Fe 1 − x Co x ) 2 As 2 and BaFe 2 (As 1 − x P x ) 2 journal January 2014
Electron doping evolution of structural and antiferromagnetic phase transitions in NaFe 1 − x Co x As iron pnictides journal July 2016
Phase diagram and neutron spin resonance of superconducting NaFe 1 − x Cu x As journal February 2017
Fast recovery of the stripe magnetic order by Mn/Fe substitution in F-doped LaFeAsO superconductors journal May 2017
Correlation-driven metal-insulator transition in proximity to an iron-based superconductor journal November 2017
Electronic and spin dynamics in the insulating iron pnictide NaFe 0.5 Cu 0.5 As journal December 2017
Toward the Mott state with magnetic cluster formation in heavily Cu-doped NaFe 1 − x Cu x As journal April 2019
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1 − x F x journal July 2008
Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition journal August 2008
Strong Correlations and Magnetic Frustration in the High T c Iron Pnictides journal August 2008
Theory of the Magnetic Moment in Iron Pnictides journal September 2008
Contrasting Spin Dynamics between Underdoped and Overdoped Ba ( Fe 1 − x Co x ) 2 As 2 journal January 2010
Unified Picture for Magnetic Correlations in Iron-Based Superconductors journal September 2010
Where Are the Extra d Electrons in Transition-Metal-Substituted Iron Pnictides? journal October 2010
Evolution from Unconventional Spin Density Wave to Superconductivity and a Pseudogaplike Phase in NaFe 1 − x Co x As journal July 2012
Dependence of Carrier Doping on the Impurity Potential in Transition-Metal-Substituted FeAs-Based Superconductors journal March 2013
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
NaFe 0.56 Cu 0.44 As : A Pnictide Insulating Phase Induced by On-Site Coulomb Interaction journal August 2016
Conduction-Electron Spin Density around Fe Impurities in Cu above and belowTK journal January 1974
Inhomogeneous Low Frequency Spin Dynamics in La 1.65 Eu 0.2 Sr 0.15 CuO 4 journal July 2000
Mixed-valence compounds journal April 1976
Commensurate Itinerant Antiferromagnetism in BaFe 2 As 2 : 75 As-NMR Studies on a Self-Flux Grown Single Crystal journal November 2008
Coexistence of itinerant electrons and local moments in iron-based superconductors journal October 2009
Ab initio Studies of Magnetism in the Iron Chalcogenides FeTe and FeSe journal September 2015

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Materials Science
Physics
RKKY interaction
iron-based superconductors
magnetic order
magnetism
nuclear magnetic resonance
pnictides
strongly correlated systems