Spin and charge dynamics in a one-dimensional two-band Hubbard model
H.-Q. Ding, William A. Goddard III
1993Phys. Rev. B, 47(2), 1149-11524cited
Abstract
A CuO chain with one or two holes doped is studied via the two-band Hubbard model in the large-U limit on a finite cluster. The quasiparticle band is E(k) is similar to 0.87J cos(2ka) with the bottom at ka = pi/2. The quasiparticles are kinks which have the character of three-spin polarons. The copper spin excitations are incommensurate spin waves. The two doped holes repel each other very slightly, in contrast to the slight attraction in the t-J model. Spin-charge separation also occurs.
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Ding, H. & III, W. A. G. (1993). Spin and charge dynamics in a one-dimensional two-band Hubbard model. *Phys. Rev. B*, *47*(2), 1149-1152. https://doi.org/10.1103/physrevb.47.1149