Artículos de revistas
Correlation exponent K-rho of the one-dimensional Kondo lattice model
Registro en:
Physical Review B. American Physical Soc, v. 70, n. 7, 2004.
1098-0121
WOS:000223716600035
10.1103/PhysRevB.70.075110
Autor
Xavier, JC
Miranda, E
Institución
Resumen
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. K-rho 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. 70 7