Corrected local-density approximation band structures, linear-response dielectric functions, and quasiparticle lifetimes in noble metals - art. no. 195122

We report the calculations of dielectric functions and quasiparticle lifeti mes for noble metals Cu, Ag, and Au performed within the LMTO-GW approach. We show that by changing the value of continuous principal quantum number o f d states it is possible to improve the calculated local density approxima tion (LDA) band structures and dielectric functions. In particular, the pla smon absorption in Ag, which is absent in the self-consistent LDA approach, is obtained with the corrected band structure. We also show that the drawb acks of the LDA band structures do not lead to qualitative changes of the q uasiparticle lifetimes. The lifetimes of electron excitations calculated by the LMTO-GW method agree well with the results of the LDA plane-wave GW ap proach. By adjusting the value of the density parameter r(s) good agreement with the results of the many-body free-electron gas calculations is also a chieved for the electrons and holes in s,p-bands. For the holes in the top d bands we report the lifetime band structures.