  Zero-Resistance States (ZRS) are normally associated with superconducting and
quantum Hall phases. Experimental detection of ZRS in two-dimensional electron
gas (2DEG) systems irridiated by microwave(MW) radiation in a magnetic field
has been quite a surprise. We develop a semiclassical transport formalism to
explain the phenomena. We find a sequence of Zero-Resistance States (ZRS)
inherited from the suppression of Shubnikov-de Haas (SdH) oscillations under
the influence of high-frequency and large amplitude microwave radiation.
Furthermore, the ZRS are well pronounced and persist up to broad intervals of
magnetic field as observed in experiments on microwave illuminated 2DEG
systems.
