- #1
hokhani
- 483
- 8
Consider a two-electron system in which both of electrons have the same spins. They like to repel each other and so it seems that the energy of the system will increase compared with the situation in which two-electron system is composed of opposite spins that they can settle in the same place.
On the other hand we read that exchange-correlation effect is due to electrons with the same spins and reduce the energy of the system. I can't understand why this effect reduce the energy!
On the other hand we read that exchange-correlation effect is due to electrons with the same spins and reduce the energy of the system. I can't understand why this effect reduce the energy!