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Phase diagram of the two-leg Kondo ladder
2004
Physical Review B
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The phase diagram of the two-leg Kondo ladder is investigated using computational techniques. Ferromagnetism is present, but only at small conduction electron densities and robust Kondo coupling J. For densities n≳0.4 and any Kondo coupling, a paramagnetic phase is found. We also observed spin dimerization at densities n=1/4 and n=1/2. The spin structure factor at small J peaks at q⃗=(2n,0)π for n≲0.5, and at q⃗=(n,1)π for n≳0.5. The charge structure factor suggests that electrons behave as
doi:10.1103/physrevb.70.172415
fatcat:ajqi5zeobnfszaxky7ujpi7hgy