Low Temperature Dynamics of an Nf-Flavor Two Level System in a Metal: Equivalence with the Nf-Channel Kondo Model to 1/Nf2 Order

G. Zaránd and K. Vladár
Phys. Rev. Lett. 76, 2133 – Published 18 March 1996
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Abstract

The low energy fixed point structure of an Nf-flavor two level system (TLS) model is studied where the conduction electron spin is replaced by the flavor quantum number f=1,,Nf. Using the multiplicative renormalization group we construct the 1/Nf2 order scaling equations and analyze their fixed point structure. The fixed point structure of this Hamiltonian is equivalent to that of the Nf-channel Kondo model and the exponent of the leading irrelevant operators is also the same. However, for a TLS an infinite number of leading irrelevant operators appear that give a contribution to the different physical quantities but do not change their critical exponents.

  • Received 5 July 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.2133

©1996 American Physical Society

Authors & Affiliations

G. Zaránd

  • Institute of Physics, Technical University of Budapest, P.O. Box 112, Budapest H-1525, Hungary

K. Vladár

  • Research Institute for Solid State Physics, P.O. Box 49, Budapest H-1525, Hungary

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Vol. 76, Iss. 12 — 18 March 1996

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