We have performed secondary ion mass spectrometry depth profiling analysis of III-V based hetero-structures at different target temperatures and found that both the surface segregation and surface roughness caused by ion sputtering can be radically reduced if the sample temperature is lowered to - 150 degrees C. The depth profiling of 'frozen' samples can be a good alternative to sample rotation and oxygen flooding used for ultra-low-energy depth profiling of compound semiconductors. Copyright (C) 2016 John Wiley & Sons, Ltd.
机构:
MAX PLANCK INST MET FORSCH,INST WERKSTOFFWISSENSCH,D-7000 STUTTGART 1,FED REP GERMAX PLANCK INST MET FORSCH,INST WERKSTOFFWISSENSCH,D-7000 STUTTGART 1,FED REP GER