TY - JOUR
T1 - Repulsion between Conduction Electrons as a Relevant Perturbation against the Stability of Non-Fermi-Liquid Fixed Point of Multichannel Kondo Problem
AU - Miyake, Kazumasa
AU - Kusunose, Hiroaki
AU - Narikiyo, Osamu
PY - 1993/1/1
Y1 - 1993/1/1
N2 - It is shown that a non-Fermi-liquid fixed point of the multichannel Kondo problem is unstable for repulsive interaction at the impurity site between conduction electrons with different flavors and the same pseudospin. The anomalous fixed point is shown, by the perturbative renormalization group argument, to move into the strong coupling region with increasing repulsion. The low-temperature properties at the so-called “Toulouse limit, are calculated by the bosonization method to show that the Fermi-liquid like behavior is recovered quickly as soon as repulsion is switched on. This result poses a question as to the reality of the non-Fermi-liquid state for the multichannel Kondo model which has been examined extensively so far.
AB - It is shown that a non-Fermi-liquid fixed point of the multichannel Kondo problem is unstable for repulsive interaction at the impurity site between conduction electrons with different flavors and the same pseudospin. The anomalous fixed point is shown, by the perturbative renormalization group argument, to move into the strong coupling region with increasing repulsion. The low-temperature properties at the so-called “Toulouse limit, are calculated by the bosonization method to show that the Fermi-liquid like behavior is recovered quickly as soon as repulsion is switched on. This result poses a question as to the reality of the non-Fermi-liquid state for the multichannel Kondo model which has been examined extensively so far.
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U2 - 10.1143/JPSJ.62.2553
DO - 10.1143/JPSJ.62.2553
M3 - Article
AN - SCOPUS:21344477875
VL - 62
SP - 2553
EP - 2556
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 8
ER -