Momentum Dependence of the Single-Particle Self-Energy and Fluctuation Spectrum of Slightly Underdoped Bi_2 Sr_2 CaCu_2 O_{8+δ} from High Resolution Laser ARPES

Jin Mo Bok, Jae Hyun Yun, Han-Yong Choi +3

We deduce the normal state angle-resolved single-particle self-energy $\Sigma (\theta ,\omega )$ and the Eliashberg function (i.e., the product of the fluctuation spectrum and its coupling to fermi…