Content deleted Content added
Bob K31416 (talk | contribs) changed "correlation" to "energy"; fixed typo in reference title |
Bob K31416 (talk | contribs) explicitly defined notation Ex and Ec |
||
Line 5:
LDA is the simplest approximation for this functional, it is ''local'' in the sense that the electron exchange and correlation energy at any point in space is a function of the electron density at that point only.<ref>{{cite journal | author = John R. Smith | title = Beyond the Local-Density Approximation: Surface Properties of (110) W | journal = Phys. Rev. Lett. | volume = 25 | issue = 15 | pages = 1023–1026 | year = 1970 | url = http://link.aps.org/abstract/PRL/v25/p1023 | doi = 10.1103/PhysRevLett.25.1023 | format = abstract}}</ref>
The XC energy functional is the sum of
:<math>E_{xc} = E_x + E_c \,\;</math>
| |||