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Guiding the design of silicon devices with im

Dr. Kyle Bushick and Professor Emmanouil Kioupakis present a consistent first-principles methodology to study both direct and phonon-assisted Auger-Meitner recombination (AMR) in indirect-gap semiconductors that we apply to investigate the microscopic origin of AMR processes in silicon. Their results are in excellent agreement with experimental measurements and show that phonon-assisted contributions dominate the recombination rate in both n-type and p-type silicon, demonstrating the critical role of phonons in enabling AMR. They also decompose the overall rates into contributions from specific phonons and electronic valleys to further elucidate the microscopic origins of AMR. Their results highlight potential pathways to modify the AMR rate in silicon via strain engineering. ....

United States , Kyle Bushick , Lise Meitner , Patriciaj Betz , Emmanouil Kioupakis , Lawrence Berkeley National Lab , Office Of Advanced Scientific Computing Research , University Of Michigan , International Energy Agency , National Energy Research Scientific Computing Center , Office Of Science , Us Department Of Energy , Energy Sciences Under Award No , Method Of Research , Lawrence Berkeley National Laboratory , Computational Materials Sciences Program , Pierre Auger , Materials Science , Physical Review Letters , Science Graduate , Associate Professor , Family Faculty Scholar , Basic Energy Sciences , Energy Office , Science User Facility , Advanced Scientific Computing Research ,

A new insight into non-radiative mechanisms

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United States , Santa Barbara , Lise Meitner , University Of California , Pierre Auger , Van De Walle ,