Dynamics of the Local Moment Induced by Nonmagnetic Defects in Cuprates

Abstract

We present a study of the spin dynamics of magnetic defects induced by Li substitution of the plane Cu in the normal state of YBa${}_2$Cu${}_3$O${}_{6+x}$. The fluctuations of the coupled Cu magnetic moments in the vicinity of Li are probed by near-neighbour ${}^{89}$Y {\it and} ${}^7$Li NMR spin lattice relaxation. The data indicates that the magnetic perturbation fluctuates as a single entity with a correlation time $\tau$ which scales with the local static susceptibility. This behaviour is reminiscent of the low $T$ Kondo state of magnetic impurities in conventional metals. Surprisingly it extends well above the ``Kondo'' temperature for the underdoped pseudogapped case.

4 pages, 5 figures (same), major modifications to text, accepted in PRL

References in corpus (7)

• Spinless impurities in high Tc cuprates: Kondo-like behavior
• Local Enhancement of Antiferromagnetic Correlations by Nonmagnetic Impurities
• Normal State Magnetic Properties of Ni and Zn Substituted in YBa_{2}Cu_{3} O_{6+x}: Hole-Doping Dependence
• Y NMR imaging of the staggered magnetization in doped Haldane chain Y(2)BaNi(1-x)Mg(x)O(5)
• Impurity-induced moments in underdoped cuprates
• Kondo Effect in High-T_c Cuprates
• Edge Logarithmic Corrections probed by Impurity NMR

Cited by in corpus (29)

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• Effect of Nonmagnetic Impurity in Nearly Antiferromagnetic Fermi Liquid: Magnetic Correlations and Transport Phenomena
• Local Moment Formation in the Superconducting State of a Doped Mott Insulator
• Correlation length in cuprates deduced from the impurity-induced magnetization
• Kondo effect in d-wave superconductors
• Local Quasiparticle States near a Unitary Impurity with Induced Magnetic Moment in a d-Wave Superconductor
• Spin-polarized quasiparticle transport in cuprate superconductors
• Pairing fluctuation theory of high $T_c$ superconductivity in the presence of nonmagnetic impurities
• Superconducting Fluctuation and Pseudogap in Disordered Short Coherence Length Superconductor
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• Analysis of the Knight shift data on Li and Zn substituted YBCO
• Spinless impurities and Kondo-like behavior in strongly correlated electron systems
• Kondo screening in d-wave superconductors in a Zeeman field and implications for STM spectra of Zn-doped cuprates
• Local Metallic and Structural Properties of the Strongly Correlated Metal LaNiO${}_3$ using ${}^8$Li $\beta$-NMR
• Spatial homogeneity and doping dependence of quasiparticle tunneling spectra in cuprate superconductors
• Emergence of strongly correlated electronic states driven by the Andreev bound state in d-wave superconductors
• Emergence of $d\pm ip$-wave superconducting state at the edge of $d$-wave superconductors mediated by Andreev-bound-state-driven ferromagnetic fluctuations
• Li Induced Spin and Charge Excitations in a Spin Ladder
• Quantum Monte Carlo study of a nonmagnetic impurity in the two-dimensional Hubbard model
• Microscopic origin of local moments in a zinc-doped high-$T_c$ superconductor
• Magnetic effect from non-magnetic impurity in superconducting CuO_{2} plane
• Edge-induced strongly correlated electronic states in two-dimensional Hubbard model: Enhancement of magnetic correlations and self-energy effects
• Effect of impurity states on the NMR spectra of high-$T_c$ cuprates
• Reply to "Localized Behavior near the Zn Impurity in YBa2Cu4O8 as Measured By Nuclear Quadrupole Resonance"
• The effects of Zn Impurity on the Properties of Doped Cuprates in the Normal State
• Why a local moment induces an antiferromagnetic ordering: An RVB picture