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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 specifi...

The world needs greener ways to make chemicals. In a new study, University of Wisconsin–Madison researchers demonstrate one potential path toward this goal by adapting hydrogen fuel cell technologies.

The performance of devices like light-emitting diodes (LEDs) has been frequently limited by defects. The mechanisms by which defects eliminate charge carriers are clearly understood in materials that liberate light at red or green wavelengths.

Cornell researchers used magnetic imaging to obtain the first direct visualization of how electrons flow in a special type of insulator, and by doing so they discovered that the transport current moves through the interior of the material, rather tha

Cornell researchers used magnetic imaging to obtain the first direct visualization of how electrons flow in quantum anomalous Hall insulators, and by doing so they discovered the transport current moves through the interior of the material.