We present electronic band structure of Ag5Pb2O6 with layered hexagonal structure containing one-dimensional chains and two-dimensional Kagom\'{e} layers of silver. A half-filled conduction band shows extremely simple, single nearly-free-electron-like Fermi surface. The conduction band is composed of an antibonding state of Pb-6s and O-2p mixing with Ag-4d and 5s. Mass enhancement in the state density at the Fermi energy is expected to be negligibly small by comparing with the specific-heat data. Calculated Fermi velocity is consistent with small anisotropy observed in transport properties. Doping effects on the electronic structure are also discussed.
@article{arxiv.cond-mat/0509268,
title = {Electronic band structure and Fermi surface of Ag$_5$Pb$_2$O$_6$},
author = {Tamio Oguchi},
journal= {arXiv preprint arXiv:cond-mat/0509268},
year = {2009}
}