Gravity and magnetic measurements are common remote sensing strategies to obtain the property change of observed targets. Nowadays, characteristic value derivatives gravity anomalies is commonly used detect source horizontal edge. We found that coordinates different-order not directly corresponding edge source, which varies with depth size source. The spatial derivative (SDD) method was develop...

Abstract We report on the growth and characterization of metalorganic vapor-phase epitaxy-grown ? -(Al x Ga 1? ) 2 O 3 / -Ga modulation-doped heterostructures. Electron channel is realized in heterostructure by utilizing a delta-doped 1– barrier. The electron characteristics are studied using transfer length method, capacitance–voltage Hall measurements. A sheet charge density 1.06 × 10 13 cm ?...

In this paper, facet formation of (0001) {112¯0} {112¯2} facets during epitaxial lateral overgrowth (ELO) GaN is investigated for different Ga vapor supersaturations. The ELO was conducted via metalorganic chemical deposition on patterned GaN/sapphire templates with SiO2 masks aligned along the ?11¯00? direction GaN. Scanning electron microscopy used to characterize cross section shapes islands...

Abstract The ex situ sputtered AlN buffer and GaN epilayer grown on top of it by metalorganic chemical vapor deposition were studied comprehensively a variety techniques including atomic force microscope, high resolution x-ray diffraction, Raman photoelectron spectroscopy characterizations. It exhibited that the deposited using sputtering technique could be oxidized with exposure in atmosphere....