Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1997-06-11
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages Revtex, no figures
Scientific paper
10.1103/PhysRevLett.79.1901
We propose an integrable Kondo problem in a one-dimensional (1D) $t-J$ model. With the open boundary condition of the wave functions at the impurity sites, the model can be exactly solved via Bethe ansatz for a class of $J_{R,L}$ (Kondo coupling constants) and $V_{L,R}$ (impurity potentials) parametrized by a single parameter $c$. The integrable value of $J_{L,R}$ runs from negative infinity to positive infinity, which allows us to study both the ferromagnetic Kondo problem and antiferromagnetic Kondo problem in a strongly correlated electron system. Generally, there is a residual entropy for the ground state, which indicates a typical non-Fermi liquid behavior.
Dai Jianhui
Hu Zhanning
Pu Fu-Cho
Wang Yupeng
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