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NUG Community Call March 21, 2024

March 21, 2024
Date: Thursday, March 21, 2024
Time: 11:00 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: (full connection details below). 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
  • Allocation Reminders
  • NERSC Tips: How to Submit a Great Ticket
  • Science Talk: NERSC Documentation Tree Testing (Annette Greiner, NERSC)
  • Topic-of-the-day: Trap-assisted Auger-Meitner recombination from first principles - Fangzhou Zhao


Trap-assisted nonradiative recombination is a key mechanism limiting the efficiency of optoelectronic devices such as light-emitting diodes. We have developed a general first-principles methodology to calculate the trap-assisted Auger-Meitner (TAAM) rate in semiconductors and shown the crucial role of TAAM in trap-assisted nonradiative recombination in wide-band-gap semiconductors [1], in which the conventional multiphonon emission mechanism cannot explain the measured loss. Our computational formalism is general and can be applied to any defect or impurity in any semiconducting or insulating material.  

[1] F. Zhao, M. E. Turiansky, A. Alkauskas, and C. G. Van de Walle, Phys. Rev. Lett. 131, 056402 (2023).

Video Recording: 


Presentation Slides:
NUG Community Call Presentation (March2024)

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Meeting ID: 285 479 463