%0 Journal Article %1 dob94epl %A Dobry, A. %A Greco, A. %A Lorenzana, J. %A Riera, J. %A Diep, H. T. %D 1994 %J Europhys. Lett. %K high-tc, htsct, theory %N 8 %P 617--622 %T Effects of Polaronic States in the Multiband Hubbard Model %U http://stacks.iop.org/0295-5075/27/617 %V 27 %X The effects of electron-lattice coupling in a multiband Hubbard model are investigated by exact diagonalization. For a system with one doped hole, and with parameters relevant to cuprate superconductors, we find a continuous transition from a delocalized to a small polaron state at a critical value of the electron-phonon interaction. We characterize this state as a Zhang-Rice singlet with distortions in the CuO4 cluster. We find, in addition, a polaronic shift of the band near the Fermi level in the spectral function of the system. An enhancement of the transfer of the low-energy spectral weight is also observed. These results are in qualitative agreement with different spectroscopic measurements for high-Tc superconductors.

@article{dob94epl, abstract = {The effects of electron-lattice coupling in a multiband Hubbard model are investigated by exact diagonalization. For a system with one doped hole, and with parameters relevant to cuprate superconductors, we find a continuous transition from a delocalized to a small polaron state at a critical value of the electron-phonon interaction. We characterize this state as a Zhang-Rice singlet with distortions in the CuO4 cluster. We find, in addition, a polaronic shift of the band near the Fermi level in the spectral function of the system. An enhancement of the transfer of the low-energy spectral weight is also observed. These results are in qualitative agreement with different spectroscopic measurements for high-Tc superconductors.}, added-at = {2008-06-25T19:30:29.000+0200}, author = {Dobry, A. and Greco, A. and Lorenzana, J. and Riera, J. and Diep, H. T.}, biburl = {https://www.bibsonomy.org/bibtex/2e667b0c6f9e5378ea964666b97028bf1/jgl}, citeulike-article-id = {2484083}, interhash = {c46c8b9fd242d28ace11ee11aa65ca7d}, intrahash = {e667b0c6f9e5378ea964666b97028bf1}, journal = {Europhys. Lett.}, keywords = {high-tc, htsct, theory}, number = 8, pages = {617--622}, posted-at = {2008-03-07 13:36:15}, priority = {2}, timestamp = {2008-06-25T19:31:44.000+0200}, title = {Effects of Polaronic States in the Multiband Hubbard Model}, url = {http://stacks.iop.org/0295-5075/27/617}, volume = 27, year = 1994 }