The spin and charge gaps of the half-filled N-leg Kondo ladders

Details The spin and charge gaps of the half-filled N-leg Kondo ladders The spin and charge gaps of the half-filled N-leg Kondo ladders

2004-05-17

arxiv.org/abs/cond-mat/0405379v1

PRB, 68, 134422 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 table, 3 figs

Scientific paper

10.1103/PhysRevB.68.134422

In this work, we study N-leg Kondo ladders at half-filling through the density matrix renormalization group. We found non-zero spin and charge gaps for any finite number of legs and Kondo coupling $J>0$. We also show evidence of the existence of a quantum critical point in the two dimensional Kondo lattice model, in agreement with previous works. Based on the binding energy of two holes, we did not find evidence of superconductivity in the 2D Kondo lattice model close to half-filling.

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