Resonant tunneling of plane, cylindrical, and spherical double-barrier quantum wells

Resonant tunneling of double-barrier quantum well (DBQW) in plane, cylindrical, and spherical geometry has been studied by a simple model for the first time. Transmission spectrum, current-voltage characteristic, and bias dependent conductance have been calculated for these structures and are found oscillating in the cylindrical and spherical DBQW. Those oscillations are explained by the different coherence of tunneling in these geometries. Dependence of the oscillation on the structures, the materials, and the external fields is discussed.