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Electronic band structure and Fermi surface of AgPbO
We present electronic band structure of AgPbO 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- and O- mixing with Ag-4d and
. 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.Comment: 6 pages, 9 figures; fig7 replaced, reference 6 adde
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