論文

査読有り
2012年1月

Convergence of Energy Scales on the Approach to a Local Quantum Critical Point

PHYSICAL REVIEW LETTERS
  • Y. Nishikawa
  • ,
  • D. J. G. Crow
  • ,
  • A. C. Hewson

108
5
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevLett.108.056402
出版者・発行元
AMER PHYSICAL SOC

We find the emergence of strong correlations and universality on the approach to the quantum critical points of a two-impurity Anderson model. The two impurities are coupled by an interimpurity exchange interaction J and direct interaction U-12 and are hybridized with separate conduction channels. The low energy behavior is described in terms of renormalized parameters. We show that on the approach to the transitions to a local singlet and a local charged ordered state, the quasiparticle weight factor z -> 0, and the renormalized parameters can be expressed in terms of a single energy scale T*. The values of the renormalized interaction parameters in terms of T* can be predicted from the condition of continuity of the spin and charge susceptibilities, and correspond to strong correlation. These predictions are confirmed by the numerical renormalization group calculations, including the case when the on site interaction U = 0.

リンク情報
DOI
https://doi.org/10.1103/PhysRevLett.108.056402
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000299832900014&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevLett.108.056402
  • ISSN : 0031-9007
  • eISSN : 1079-7114
  • Web of Science ID : WOS:000299832900014

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