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The effects of annealing on the atomic structures of , , and are investigated using accelerated molecular dynamics (MD) simulations. Using population annealing with Boltzmann resampling to expedite the MD simulations, it is shown that annealed models demonstrate subtle but statistically significant changes in the structure. Consistent with experiments,...
Two-step direct current electroplating was used to fabricate copper microcylinders with a 50 μm diameter and 150 μm depth. The microstructure was characterised by electron back scattering detection. Twin boundaries appeared and the twin quantity depended on the current density. Near the edge (2 mA/cm2), the grain size was large (∼2 μm) and many twins existed, while the size was small (∼0.5 μm) and...
With isothermal annealing treatment at 1873 K, unintentionally doped 4H-SiC epitaxial layers grown by low-pressure chemical vapor deposition (LPCVD) have been studied using electron spin resonance (ESR) and low temperature photoluminescence (PL). ESR and PL spectra show that the native defects are the mixture of carbon vacancy (VC) and its extended point defects. The decrease of key parameter g vector...
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