Electronic band structure and Fermi surface of Ag$_5$Pb$_2$O$_6$

Details Electronic band structure and Fermi surface of Ag$_5$Pb$_2$O$_6$ Electronic band structure and Fermi surface of Ag$_5$Pb$_2$O$_6$

2005-09-10

arxiv.org/abs/cond-mat/0509268v2

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 9 figures; fig7 replaced, reference 6 added

Scientific paper

10.1103/PhysRevB.72.245105

We present electronic band structure of Ag$_5$Pb$_2$O$_6$ 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.

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