NERSCPowering Scientific Discovery for 50 Years

NUG Community Call May 23, 2024

May 23, 2024
Date: Thursday, May 23, 2024
Time: 11:00 AM PST


The Monthly NUG Community Call is a regular opportunity for our users to show off what they've done, for NERSC to get feedback from users, and for users to exchange ideas.

Zoom: Join from PC, Mac, Linux, iOS or Android:
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We'll also use the NERSC Users Slack #webinars channel for discussion before, during and after the meeting.

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  • Announcements and Calls for Participation: Upcoming conferences, workshops, or other events, that you think might interest or benefit the NERSC user community
  • NERSC & U: Find out about the latest programmatic efforts by NERSC and the Department of Energy to electrify scientific advancements
  • NERSC Early Career Award Winner Speaker: "Phonon-assisted Auger-Meitner Recombination from First Principles - Kyle Bushick, PhD


NERSC Early Career Award Winner Title: "Phonon-assisted Auger-Meitner Recombination from First Principles by Kyle Bushick, PhD


Auger-Meitner recombination (AMR) is an intrinsic, non-radiative recombination process that affects device performance in applications such as light emitting diodes and solar cells. AMR can occur in a variety of permutations: either an electron or hole can be excited and there is a chance for one of the electronic carriers to interact with the atomic lattice via electron-phonon coupling. Unfortunately, studying the contributions from these different direct and phonon-assisted mechanisms is challenging experimentally. To address this challenge, we have developed a computational methodology to calculate AMR coefficients from first principles, enabling the focused study and analysis of both direct and phonon-assisted AMR in bulk semiconductor materials. In this talk, I will focus on our application of this methodology to silicon, where despite its overwhelming importance as a semiconductor, the microscopic mechanisms of AMR remain poorly understood. Our results provide a clearer understanding of AMR in silicon and point to engineering solutions that may improve the efficiency of silicon devices.


Kyle Bushick is a postdoctoral researcher in the Quantum Simulation Group at Lawrence Livermore National Lab. His research interests center around the application and development of computational methods to improve our fundamental understanding of materials at an atomic level. Prior to his current position, he was a DOE Computational Science Graduate Fellow at the University of Michigan, where he earned his PhD in Materials Science and Engineering and Scientific Computing. His PhD research was focused on understanding electron and electron-phonon mediated quantum processes in semiconductors which govern material properties and performance.

Video Recording:


Presentation Slides:

NUG Intro
Kyle Bushick Early Career Presentation