Charge and spin dynamics of the Hubbard chains
arXiv:cond-mat/9907420 · doi:10.1016/S0921-4534(99)00522-5
Abstract
We calculate the local correlation functions of charge and spin for the one-chain and two-chain Hubbard model using the density matrix renormalization group method and the recursion technique. Keeping only finite number of states we get good accuracy for the low energy excitations. We study the charge and spin gaps, bandwidths and weights of the spectra for various values of the on-site Coulomb interaction U and the electron filling. In the low energy part, the local correlation functions are different for the charge and spin. The bandwidths are proportional to t for the charge and J for the spin, respectively.
19 latex pages, 9 figures
References in corpus (5)
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- The N-chain Hubbard Model in Weak Coupling
- Systematic numerical study of spin-charge separation in one dimension
- Photoemission spectra of the t-J model in 1 and 2D: similarities and differences
- Phase diagram of the two-chain Hubbard model