Kondo temperature for the two-channel Kondo models of tunneling centers.
Phys Rev Lett
; 86(12): 2629-32, 2001 Mar 19.
Article
em En
| MEDLINE
| ID: mdl-11289997
ABSTRACT
A two-channel Kondo (2CK) non-Fermi liquid state in a metal resulting from the interaction between electrons and structural defects modeled by double-well potentials (DWP) is revisited. Account only of the two lowest states in DWP is known to lead to rather low Kondo temperature, T(K). We prove that the contribution of higher excited states reduces T(K), if all of the intermediate states are taken into account. Prefactor in T(K) is shown to be determined by the spacing between the second and the third levels epsilon(3) in DWP rather than by the electron Fermi energy epsilon(F). Since epsilon(3)<
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Qualitative_research
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En
Ano de publicação:
2001
Tipo de documento:
Article