Disorder-driven non-Fermi liquid behaviour of correlated electrons

Miranda, E.; Dobrosavljević, Vladimir

doi:10.1088/0034-4885/68/10/r02

Cited by 224 publications

(260 citation statements)

References 305 publications

(480 reference statements)

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“…44) However, we consider that the disorder effect does not seem to be the main reason for the − ln T divergence in M/B and C p /T . If the energy distribution width of the low-lying electronic states due to the disorder is a few or ten Kelvin in accordance with the temperature range of the − ln T dependence in M/B, it is expected that the magnitude of C p /T in the corresponding temperature range would significantly depend on the strength of the disorder, and eventually on x.…”

Section: Relationship Between the Doped Ionic Position And Thementioning

confidence: 79%

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

et al. 2016

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The effect of off-plane impurity on superconductivity and non-Fermi-liquid (NFL) behavior in the layered heavyfermion compound CeCo 1−x Ni x In 5 is investigated by specific heat, magnetization, and electrical resistivity measurements. These measurements reveal that the superconducting (SC) transition temperature T c monotonically decreases from 2.3 K (x = 0) to 0.8 K (x = 0.20) with increasing x, and then the SC order disappears above x = 0.25. At the same time, the Ni substitution yields the NFL behavior at zero field for x = 0.25, characterized by the − ln T divergence in specific heat divided by temperature, C p /T , and magnetic susceptibility, M/B. The NFL behavior in magnetic fields for x = 0.25 is quite similar to that seen at around the SC upper critical field in pure CeCoIn 5 , suggesting that both compounds are governed by the same antiferromagnetic quantum criticality. The resemblance of the doping effect on the SC order among Ni-, Sn-, and Pt-substituted CeCoIn 5 supports the argument that the doped carriers are primarily responsible for the breakdown of the SC order. The present investigation further reveals the quantitative differences in the trends of the suppression of superconductivity between Ce(Co,Ni)In 5 and the other alloys, such as the rates of decrease in T c , dT c /dx, and specific heat jump at T c , d(∆C p /T c )/dx. We suggest that the occupied positions of the doped ions play an important role in the origin of these differences.

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Section: Relationship Between the Doped Ionic Position And Thementioning

confidence: 79%

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

et al. 2016

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“…3c). It is, however, not impossible that disorder 37 also contributes to the Fermi liquid breakdown. The elastic scattering, presumably originating from impurities, increases dramatically across the Fermi liquid breakdown as shown in Supplementary Fig.…”

Section: Discussionmentioning

confidence: 99%

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

et al. 2013

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High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid quasiparticle excitations break down in momentum space. Here we show, using angle-resolved photoemission spectroscopy, that the Fermi liquid quasiparticle excitations of the overdoped superconducting cuprate La 1.77 Sr 0.23 CuO 4 is highly anisotropic in momentum space. The quasiparticle scattering and residue behave differently along the Fermi surface and hence the Kadowaki-Wood's relation is not obeyed. This kind of Fermi liquid breakdown may apply to a wide range of strongly correlated metal systems where spin fluctuations are present.

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“…(5). The correlation function of LDOS can then be rewritten in terms of the spectral correlation function R 2 (ω),…”

Section: Fluctuations Of Tk In a Disordered Metalmentioning

confidence: 99%

“…3,4 Disorder affects the formation of this Kondo singlet in various ways. 5 In particular, the Kondo temperature may depend on the positioning of the magnetic impurities in the host lattice. Thus, for a sample containing many magnetic impurities, T K may be distributed due to fluctuations of the microscopic exchange coupling.…”

Section: Introductionmentioning

confidence: 99%

Disorder-quenched Kondo effect in mesoscopic electronic systems

Kettemann

Mucciolo

2007

Phys. Rev. B

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Nonmagnetic disorder is shown to quench the screening of magnetic moments in metals, the Kondo effect. The probability that a magnetic moment remains free down to zero temperature is found to increase with disorder strength. Experimental consequences for disordered metals are studied. In particular, it is shown that the presence of magnetic impurities with a small Kondo temperature enhances the electron's dephasing rate at low temperatures in comparison to the clean metal case. It is furthermore proven that the width of the distribution of Kondo temperatures remains finite in the thermodynamic (infinite volume) limit due to wave function correlations within an energy interval of order 1/τ , where τ is the elastic scattering time. When time-reversal symmetry is broken either by applying a magnetic field or by increasing the concentration of magnetic impurities, the distribution of Kondo temperatures becomes narrower.

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Disorder-driven non-Fermi liquid behaviour of correlated electrons

Cited by 224 publications

References 305 publications

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Disorder-quenched Kondo effect in mesoscopic electronic systems

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Disorder-driven non-Fermi liquid behaviour of correlated electrons

Cited by 224 publications

References 305 publications

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo1−xNixIn5

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo1−xNixIn5

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Disorder-quenched Kondo effect in mesoscopic electronic systems

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Product

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Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅