Non-Fermi Liquid Behavior in Kondo Models(<SPECIAL TOPICS>Kondo Effect-40 Years after the Discovery)

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概要

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• Despite the fact that the low energy behavior of the basic Kondo model cannot be studied perturbatively it was eventually shown by Wilson, Anderson, Nozieres and others to have a simple "local Fermi liquid theory" description. That is electronic degrees of freedom become effectively noninteracting in the zero energy limit. However, generalized versions of the Kondo model involving more than one channel or impurity may exhibit low energy behavior of a less trivial sort which can, nonetheless, be solved exactly using either Bethe ansatz or conformal field theory and bosonization techniques. Now the low energy limit exhibits interacting many body behavior. For example, processes in which a single electron scatters off the impurity into a multi electron-hole state have a non-vanishing (and sometimes large) amplitude at zero energy. This corresponds to a rare solveable example of non-Fermi liquid behavior. Essential features of these phenomena are reviewed here.

• 社団法人日本物理学会の論文
• 2005-01-15

著者

• Affleck Ian

  Department Of Physics And Astronomy University Of British Columbia

関連論文

• Magnetization Plateau of the S=1/2 Frustrated Heisenberg Chain with Period 3 Parity Invariant Exchange Modulation(Magnetization Plateaus, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
• Quantum vs classical magnetization plateaus of S=1/2 frustrated Heisenberg chains
• Non-Fermi Liquid Behavior in Kondo Models(Kondo Effect-40 Years after the Discovery)

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