Angle and frequency dependence of self-energy from spin fluctuation mediated d-wave pairing for high temperature superconductors.
We investigated the characteristics of spin fluctuation mediated superconductivity employing the Eliashberg formalism. The effective interaction between electrons was modeled in terms of the spin susceptibility measured by inelastic neutron scattering experiments on single crystal La(2-x)Sr(x)CuO4 superconductors. The diagonal self-energy and off-diagonal self-energy were calculated by solving the coupled Eliashberg equation self-consistently for the chosen spin susceptibility and tight-binding dispersion of electrons. The full momentum and frequency dependence of the self-energy is presented for optimally doped, overdoped, and underdoped LSCO cuprates in a superconductive state. These results may be compared with the experimentally deduced self-energy from ARPES experiments.
Department of Physics and Institute for Basic Science Research, SungKyunKwan University, Suwon 440-746, Korea.
Seung Hwan
SH
Hong
Han-Yong
HY
Choi