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Critical Nature of Non-Fermi Liquid in Spin 3/2 Multipolar Kondo Model

Kazumasa Hattori
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Abstract

A multipolar Kondo model of an impurity spin S_I=3/2 interacting with conduction electrons with spin s_c=3/2 is investigated using boundary conformal field theory. A two-channel Kondo (2CK) -like non-Fermi liquid (NFL) under the particle-hole symmetry is derived explicitly using a ``superspin absorption'' in the sector of a hidden symmetry, SO(5). We discuss the difference between the usual spin-1/2 2CK NFL fixed point and the present one. In particular, we find that, unlike the usual 2CK model, the low temperature impurity specific heat is proportional to temperature.

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Kazumasa Hattori. 2005-12-15. Critical Nature of Non-Fermi Liquid in Spin 3/2 Multipolar Kondo Model. https://doi.org/10.1143/jpsj.74.3135

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