On the ground states of some s-d exchange Kondo Hamiltonians
- 20 February 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (5) , 803-817
- https://doi.org/10.1088/0022-3719/13/5/011
Abstract
Renormalisation-group calculations show that the ground state of an arbitrary mathematical Kondo Hamiltonian is not a state of zero spin in general. An S=0 state only occurs when special relations exist between the number of suitably coupled scattering channels and the magnitude of the impurity spin. A study of the physics underlying the formation of an impurity spin, and numerical calculations on a model example, show that these conditions may be satisfied by real spin impurities.Keywords
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