Individual Phonon-Phonon Processes in GaAs
Department
Physics
Major
Physics and Applied Mathematics
Research Advisor
Chernatynskiy, Aleksandr V.
Advisor's Department
Physics
Funding Source
Dr. Chernatynskiy
Abstract
Experimental data on individual phonon-phonon interaction processes is rare and permits detailed experimental confirmation of the recently developed computational methods. Here, we present the theoretical explanation of the recent laboratory experiments using computer simulations. The experiment studied the longitudinal acoustic phonons at low temperature and high frequency for GaAs superlattices. The experimental data found deviation from the Herring process contribution estimations at 50 K which we verified computationally. We further explore individual phonon processes looking for possible explanations to this apparent breakdown of Herring processes in order to gain a better understanding of longitudinal acoustic phonon propagation in GaAs.
Biography
Brett Ballard is a junior from Warrensburg, MO pursuing a dual major in physics and applied mathematics. Aside from having a 4.0 gpa, he has been serving as SPS(Society of Physics Students) President for Fall 2018 and Spring 2019. Brett plans to pursue a Ph.D. in physics upon completion of both of his bachelor’s in the spring of 2020. He has been researching phonon propagation and interactions with Dr. Chernatynskiy of the physics department since May 2018.
Research Category
Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Location
Upper Atrium
Presentation Date
16 Apr 2019, 9:00 am - 3:00 pm
Individual Phonon-Phonon Processes in GaAs
Upper Atrium
Experimental data on individual phonon-phonon interaction processes is rare and permits detailed experimental confirmation of the recently developed computational methods. Here, we present the theoretical explanation of the recent laboratory experiments using computer simulations. The experiment studied the longitudinal acoustic phonons at low temperature and high frequency for GaAs superlattices. The experimental data found deviation from the Herring process contribution estimations at 50 K which we verified computationally. We further explore individual phonon processes looking for possible explanations to this apparent breakdown of Herring processes in order to gain a better understanding of longitudinal acoustic phonon propagation in GaAs.
