Banyan Electrons are injected at the lower left and ride over a bumpy landscape, with the elevation slowly rising toward the top of the image Electrons are launched from the lower left over a bumpy landscape simulating donor atoms near an electron gas. There is also a potential gradient in this case, slowing the electrons down as the approach the top of the image, and turning them back so that they head toward the bottom again As they slow down, the bumps become too high to surmount, and several hilltops are visible as excluded holes in the upper third of the pictureBanyan Electrons are injected at the lower left and ride over a bumpy landscape, with the elevation slowly rising toward the top of the image. Electrons are launched from the lower left over a bumpy landscape simulating donor atoms near an electron gas. There is also a potential gradient in this case, slowing the electrons down as the approach the top of the image, and turning them back so that they head toward the bottom again. As they slow down, the bumps become too high to surmount, and several hilltops are visible as excluded holes in the upper third of the picture