Electronic Transport in Expanded Liquid Mercury

We report the results of an experimental study of the electronic transport properties (Hall effect and electrical conductivity) of expanded liquid mercury in the density range 13.6-8.5 g cm^-3 (temperature region 10-1500^∘{}C and pressure region 1-1900 atm). From the correlation of the Hall coefficient and the conductivity, three distinct conduction regimes were identified in this one-component system: (a) the weak-scattering metallic region (13.6-11 g cm^-3), (b) the strong-scattering metallic region (11.0-9.2 g cm^-3), and (c) the localization regime ( 9.2 g cm^-3). Detailed information has been obtained for the formation of the pseudogap and the metal-nonmetal transition in this disordered system.