Results 221 to 230 of about 23,620 (258)
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Kondo effect in disordered systems
Physical Review Letters, 1992We consider a system of dilute magnetic impurities placed in a disordered metal, and examine the modifications of the Kondo temperature T k due to the presence of disorder. Our calculations, based on a slave-boson approach, show that the probability distribution P(T k ) for Kondo temperatures can be related to the local-density-of-states fluctuations ...
, Dobrosavljevic +2 more
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Effect of pressure on Kondo insulators
Physical Review B, 1996We introduce a formulation of heavy-fermion systems under applied pressure, in which the cell-volume change resulting from the valence fluctuation between the f singlet and magnetic multiplet accounts for the pressure dependence of the energy gap in Kondo insulators.
, Xu, , Li, , Xiao
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Kondo effect in a Luttinger liquid
Physical Review Letters, 1992We treat the Kondo effect in one-dimensional interacting systems. We find that for repulsive interaction and off half filling, the Kondo temperature ${\mathit{T}}_{\mathit{K}}$\ensuremath{\propto}(J${\mathrm{\ensuremath{\tau}}}_{0}$${)}^{2/\mathrm{\ensuremath{\eta}}}$, where \ensuremath{\eta} is the nonuniversal spin-density-wave exponent of the host ...
, Lee, , Toner
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Alloying effects of Kondo insulators
Physical Review B, 1994The effects of nonmagnetic impurities (Kondo holes) in Kondo insulators (KI's) are studied based on the U=\ensuremath{\infty} Anderson model in the framework of a slave-boson mean-field theory under the coherent-potential approximation (CPA). The density of states for f electrons and its variation with the concentration of Kondo holes are calculated ...
, Li, , Xu, , Chen, , Xiao
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Kondo effect in gapless superconductors
Physical Review B, 1992We present a self-consistent theory of Kondo impurities in gapless unconventional superconductors valid in the Fermi-liquid regime T\ensuremath{\lesssim}${\mathit{T}}_{\mathit{K}}$. The impurity degrees of freedom are treated using the large-N slave-boson technique, leading to tractable equations describing the interplay between the Kondo effect and ...
, Borkowski, , Hirschfeld
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1969
The resistivity minimum and other anomalies observed in some metals at low temperatures have been a puzzle for a long time. The explanation of the resistivity anomaly given by Kondo /1/ in his famous paper turned out to be extremely stimulating for both, theoretists and experimentalists. I would like to discuss in Sec. 2 some of the recent experimental
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The resistivity minimum and other anomalies observed in some metals at low temperatures have been a puzzle for a long time. The explanation of the resistivity anomaly given by Kondo /1/ in his famous paper turned out to be extremely stimulating for both, theoretists and experimentalists. I would like to discuss in Sec. 2 some of the recent experimental
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Journal of Low Temperature Physics, 1971
The magnetic susceptibility of Zn alloys containing 7.6–182 ppm Mn were measured in the range 1.4–4.2 K. The zero-field susceptibility can be described by a Curie-Weiss law with a concentration-independent intercept on the temperature axis, which yields a Kondo temperatureT K =0.24 K.
R. S. Newrock +3 more
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The magnetic susceptibility of Zn alloys containing 7.6–182 ppm Mn were measured in the range 1.4–4.2 K. The zero-field susceptibility can be described by a Curie-Weiss law with a concentration-independent intercept on the temperature axis, which yields a Kondo temperatureT K =0.24 K.
R. S. Newrock +3 more
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Journal of Magnetism and Magnetic Materials, 1983
Abstract Interplay between the Kondo effect and localization is examined. Susceptibility and conductivity are shown to have corrections proportional to λJ2ln2(l/t) and λJ3/t, respectively, in two dimension where λ = ℏh/2π∈Fτt = ℏh/2πτkT. The ground state is discussed to be singlet or Ising-like doublet as in pure systems even when electrons are ...
Fusayoshi J. Ohkawa +2 more
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Abstract Interplay between the Kondo effect and localization is examined. Susceptibility and conductivity are shown to have corrections proportional to λJ2ln2(l/t) and λJ3/t, respectively, in two dimension where λ = ℏh/2π∈Fτt = ℏh/2πτkT. The ground state is discussed to be singlet or Ising-like doublet as in pure systems even when electrons are ...
Fusayoshi J. Ohkawa +2 more
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Analyticity and the Kondo Effect
Physical Review, 1967The analytic properties of the amplitudes satisfying Nagaoka's and Suhl's integral equations, respectively, are examined without solving the equations. The technique used is to analytically continue the equations themselves by deforming the contours of integration appearing in them. This turns out to be a very simple method of examining the singularity
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