= Lu Jeu Sham
{c}
{tag=Physicist}
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<Lu Jeu Sham> and <Walter Kohn> developed self-consistent equations that make <density functional theory> computationally useful. The <Kohn-Sham equations> introduce an auxiliary system of noninteracting <electrons> with the same ground-state <electron density> as the interacting system. An effective potential includes the external potential, electrostatic repulsion and an <exchange-correlation functional>. Solving the equations and updating the <electron density> iteratively gives a self-consistent state. The difficult many-electron effects remain in the <exchange-correlation functional>, so practical calculations still need an approximation to it.<Self-Consistent Equations Including Exchange and Correlation Effects by Walter Kohn and Lu Jeu Sham>[Physical Review 140, A1133–A1138 (1965), effective one-electron equations]{ref}
\Image[https://cmrr.ucsd.edu/_images/profiles/sham.jpg]
{title=Portrait of <Lu Jeu Sham>}
{description=External portrait hosted by University of California San Diego, Center for Memory and Recording Research.}
{source=https://cmrr.ucsd.edu/research/faculty-profiles/sham.html}
{width=260}
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