Charge Kondo Effect toward a Non-Fermi-Liquid Fixed Point in the Orbitally Degenerate Exchange Model
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概要
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We sJaow tlaat a Kondo-type rnodel with aza orbital degezueracy has 21 IICXV non-Fertaai-liqtzidfixed poizat. Near the fixed point tlae spin degrees of freedorn are cotnpletely qtrencl'aed, and theresidual charge degrees of freedorn lead to the multicl'nannel Kondo efl'ect. Anornalotts behaxziorappears in electric auad thermal properties, btrt the znagnetic susceptibility shotrld show tl'xe localFeruni-liqtrid behavior. The taon-Fernai-liquid fixed jcoint beconaes txnstable against perttrrbationsbreaking the particle-hole sytnunetry. We derixze these results using the tl?ird-order scaling for aspherically sytautaaetric unodel xvith a fictitious spin. In contrast to tlae Coqblin-Schrieffer naodel,the present uaaodeJ respects different time-reversal properties of naultipole operator,';.
- 社団法人日本物理学会の論文
- 1999-06-15
著者
-
楠瀬 博明
愛媛大理
-
Kusunose Hiroaki
Department Of Material Physics Faculty Of Engineering Science Osaka University
-
Kuramoto Yoshio
Department Of Applied Physics Faculty Of Engineering Tohoku University
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