The way it was taught to me was the ground state is the dominate voltage state present. All charges will align themselves and either dissipate or absorb energy to synchronize with this dominate voltage field. In addition to that all atoms have a preferred relative voltage state to other atoms. As time moves on I have observed dynamic voltage systems that sometimes will violate these standard principles.
It is standard knowledge that if enough positive voltage is applied to an atom, electrons will repel from the atom and move toward the stronger positive voltage source. I've mentioned that the electron appears to have turned into a positron when it does this. But just briefly. Remove the stronger voltage field and the electron will give up its previous positron status and return to its preferred electron status. But I've found others wont accept that viewpoint.
But it does tend to suggest that an electron can be its own anti-particle just based on what voltage state it is in relative to other electrons.