Two energy scales and breakdown of renormalizability in the Kondo problem

Authors
Ovchinnikov, YN Dyugaev, AM
Citation
Yn. Ovchinnikov et Am. Dyugaev, Two energy scales and breakdown of renormalizability in the Kondo problem, JETP LETTER, 70(2), 1999, pp. 111-116
Citations number
6
Categorie Soggetti
Physics
Journal title
JETP LETTERS
ISSN journal
00213640 → ACNP
Volume
70
Issue
2
Year of publication
1999
Pages
111 - 116
Database
ISI
SICI code
0021-3640(19990725)70:2<111:TESABO>2.0.ZU;2-O
Abstract
It is shown that a second energy scale T(0)much greater than 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 tem peratures much higher than the Kondo temperature T-k. (C) 1999 American Ins titute of Physics. [S0021-3640(99)00814-2].