RESONANT TUNNELING CURRENT PHONONS TEM MODELING QUANTUM WELLS PEROVSKITE NUMERICAL METHODS DISTORTION AMYLOSE SUPERSINGULAR POTENTIALS GD2CUO4 DIFFRACTION DOUBLE-EXCHANGE GIANT MAGNETORESISTANCE ACOUSTIC METHOD OF MOMENTS SEMICONDUCTOR HETEROSTRUCTURES SEMIMAGNETIC STARCH R2CUO4 COMPOUNDS HOLE INTRASUBBAND SPIN-FLIP BOUND STATES SCHRÖDINGER EQUATION SUPERCONDUCTIVITY MANGANITES LAMNO3