“…[1,2,3,4,5] A surge in theory has already produced a physical framework for viewing this extraordinary phenomenon, with testable predictions for further experiment. [6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30] A class of hypothesis attributes radiation induced resistance oscillations to B-dependent enhancement/reduction of the current. [6,8,10,12] An oscillatory density-of-states, an electric field, and impurity scattering appear to be the key ingredients in theory, which indicates negative resistivity for sufficiently large radiation intensities.…”