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Exact Solution of a Backward Scattering Kondo Model |
| WANG Yu-peng1;PU Fu- ke2,3(Fu-Cho PU) |
| 1Cryogenic Laboratory, Chinese Academy of Sciences, Beijing 100080
2Department of Physics, Guangzhou Teachers’College, Guangzhou 510400
3Institute of Physics, Chinese Academy of Sciences, Beijing 100080
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| Cite this article: |
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WANG Yu-peng, PU Fu- ke, (Fu-Cho PU) 1996 Chin. Phys. Lett. 13 703-706 |
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Abstract To specify the difference between the one-dimensional Kondo problem and the three-dimensional Kondo problem, we consider a model which describes the interaction between one-dimensional free electrons and a magnetic impurity. Bethe ansatz exact results and scaling analysis show that if JF > -| JB |, the Kondo screening occurs. There is no ferromagnetic Kondo screening in such a system but the long range antiferromagnetic Kondo coupling is relevant. As soon as the Coulomb interaction is introduced, the crossovers between the scaling trajectories in the parameter region JF < -| JB | and the trajectories in other parameter regions arise and ferromagnetic Kondo screening may occur.
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| Keywords:
72.15.Qm
75.20. Hr
71.27.+a
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Published: 01 September 1996
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| PACS: |
72.15.Qm
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(Scattering mechanisms and Kondo effect)
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75.20. Hr
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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