Chin. Phys. Lett.  1996, Vol. 13 Issue (9): 703-706    DOI:
Original Articles |
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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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.




Keywords: 72.15.Qm      75.20. Hr      71.27.+a     
Published: 01 September 1996
PACS:  72.15.Qm (Scattering mechanisms and Kondo effect)  
  75.20. Hr  
  71.27.+a (Strongly correlated electron systems; heavy fermions)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1996/V13/I9/0703
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