Correlation exponent K_rho of the one-dimensional Kondo lattice model

Details Correlation exponent K_rho of the one-dimensional Kondo lattice model Correlation exponent K_rho of the one-dimensional Kondo lattice model

2003-04-25

arxiv.org/abs/cond-mat/0304585v3

Phys. Rev. B 70, 075110 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.70.075110

We present results for the correlation exponent K_rho of the Tomonaga-Luttinger liquid description of the one-dimensional Kondo lattice as a function of conduction electron density and coupling constant. It is obtained from the first derivative of the Fourier transform of the charge-charge correlation function. We also show that the spin correlation function can only be described in this picture if we include logarithmic corrections, a feature that had been previously overlooked. A consistent description of both charge and spin sectors is then obtained. Finally, we show evidence that the spin sector of the dimerized phase at quarter-filling is gapless.

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