Crossover Temperature from Non-Fermi Liquid to Fermi Liquid Behavior in Two Types of Impurity Kondo Model
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概要
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Numerical renormalization-group results on entropy of the anisotropic two-channel Kondo model with the band-width cutoff (D) in the presence of a magnetic field (h) are obtained to determine crossover temperature from the non-Fermi liquid to Fermi liquid fixed point. It is found that the crossover temperature (T_x) is given by T_x ≡ rT_K 〜 D(ΔJ/J_<av>)^2e^<-1/J_<av>> when (h/T_K)^2 ≪ r ≪ 1, where T_K, J_<av> and ΔJ are the Kondo temperature, the average and difference of the exchange coupling constants, respectively. This result indicates that non-Fermi liquid behavior can be seen even if ΔJ ≫T_K. Robust similarities of the crossover behavior in the region around the non-Fermi liquid critical point to that of the two-impurity Kondo model are also discussed.
- 社団法人日本物理学会の論文
- 2002-07-15
著者
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Maebashi Hideaki
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Maebashi Hideaki
Department Of Condensed Matter Physics The Institute Of Scientific And Industrial Research Osaka Uni
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Maebashi Hideaki
Department Of Condensed Matter Physics The Institute Of Scientific And Industrial Research Osaka Uni
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Yotsuhashi Satoshi
Division Of Materials Physics Department Of Physical Science Graduate School Of Engineering Science
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Yotsuhashi Satoshi
Division Of Materials Physics Department Of Physical Science Graduated School Of Engineering Science
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