ARPES spectra of polaron in the t-J model

作者：Mishchenko AS^*; Nagaosa N

来源：Journal of Physics and Chemistry of Solids, 2006, 67(1-3): 259-261.

DOI：10.1016/j.jpcs.2005.10.039

• superconductors
• photoelectron spectoscopy
• lattice dynamics

We present numeric results for angle resolved photoemission spectra (ARPES) for single hole in t-J model coupled to optical phonons. The diagrammatic Monte Carlo is employed where the Feynman graphs are summed up exactly with respect to phonons, while magnetic variables are subjected to non-crossing approximation. We obtain that at electron-phonon coupling constants relevant for high T-c cuprates the polaron undergoes self-trapping crossover to strong coupling limit and theoretical ARPES demonstrate features observed in experiment: a broad peak in the bottom of the spectra has momentum dependence which coincides with that of hole in pure t-J model.

• 出版日期2006-3