Metal-non-metal transition of expanded liquid Caesium

The electrical resistivity and the thermoelectric power of liquid metal Cs have been theoretically investigated using the muffin-tin potential approach with the help of an accurate experimentally measured structure factor,S(q), and radial distribution function,g(r) measured along the liquid-vapour coexistence curve. Our procedure provides a clear evidence of the existence of metal-non-metal transition in the temperature region 1500-1800 K. Furthermore, this transition was apprehended by monitoring the shift of the position of the Fermi energy relative to the muffin-tin-zero potential, as well as the effective number of conduction electrons,N-c, in the conduction band.