The Problem – How to Approximate the Periodic Atomic Potential?aaa+Ze+Ze+Ze+Ze2
The Free Electron ModelInitially proposed by Drude - 1900The deep electrostatic potential near an atom’s nucleus “on average”The deep electrostatic potential near an atom s nucleus on averageis canceled out by the core electrons to produce a slowly varyingpotential between the atomic cores. A crude first approximation is apotential well with a flat bottom:( )?U(r)potential well with a flat bottomFree electron model????rDeveloped to explain some of the common distinguishing properties of metals:•high thermal conductivity3•good electrical conductivity•low specific heats
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