Before revision: A High-Field Domain is a band of elevated field orthogonal to the equi-current lines and seen in photoconductive and monochromatic light at the band edge as dark band was discovered by Boer ,Karl W. Böer, Z. Physik 155, 184 (1959) using the Franz-Keldysh effect.
After revision: A High-Field Domain is a band of elevated field orthogonal to the equi-current lines and seen in photoconductive and monochromatic light at the band edge as dark band was discovered by Böer ,Karl W. Böer, Z. Physik 155, 184 (1959) using the Franz-Keldysh effect.