Two energy scales and breakdown of renormalizability in the Kondo problem |
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| Authors: | Yu N Ovchinnikov A M Dyugaev |
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| Institution: | (1) Max Planck Institute for Physics of Complex Systems, D-01187 Dresden, Germany;(2) L. D. Landau Institute of Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia |
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| Abstract: | It is shown that a second energy scale T
0 ≫ T
k arises in the Kondo problem. Perturbation theory is valid only in the region T > T
0. For this reason, the transition from weak to strong coupling occurs at temperatures much higher than the Kondo temperature
T
k.
Pis’ma Zh. éksp. Teor. Fiz. 70, No. 2, 106–111 (25 July 1999) |
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| Keywords: | |
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