The University of Mississippi
Department of Physics and Astronomy

Seminars/Colloquia, Fall 2021

Unless noted otherwise, Tuesday Colloquia are at 4:00 PM
Scheduling for additional seminars will vary.

For the Online colloquia, please join Zoom Meeting:
https://olemiss.zoom.us/j/91928227187
Meeting ID: 919 282 27187

Date/Place Speaker Title (and link to abstract)
Tue, Aug 24
Outside or Lewis 101
Department Faculty
Department of Physics and Astronomy
University of Mississippi
Ice Cream Social. (PDF)
Tue, Aug 31
Lewis 101
Jake Bennett, etc.
Department of Physics and Astronomy
University of Mississippi
What can you do with a Physics degree?
Tue, Sep 7
Lewis 101
Martin Frank
Department of Physics
University of South Alabama
First Results from NOνA's Magnetic Monopole Search
Tue, Sep 14
Lewis 101
Shawn Pollard
Department of Physics and Materials Science
University of Memphis
Designing Chiral Magnetism Through Interface Engineering – From Skyrmions to Magnetic Memory
Tue, Sep 21
Lewis 101
 
 
 
 
Tue, Sep 28
Lewis 101
Samrat Choudhury
Department of Mechanical Engineering
University of Mississippi
Machine Learning Enabled Multi-Scale Modeling of Materials
Tue, Oct 5
Lewis 101
 
 
 
 
Tue, Oct 12
Lewis 101
 
 
 
 
Tue, Oct 19
Lewis 101
 
 
 
 
Tue, Oct 26
Lewis 101
 
 
 
 
Tue, Nov 2
Lewis 101
Alexandru Lupsasca
Department of Physics
Princeton
 
Tue, Nov 9
Lewis 101
 
 
 
 
Tue, Nov 16
Lewis 101
 
 
 
 
Tue, Nov 23
Lewis 101
Thomas Turkey
Department of Nutrition
Virginia Tech
Continuing Advantages of a Vegetarian Diet
Tue, Nov 30
Lewis 101
 
 
 
 
Tue, Dec 7
Lewis 101
Final Exam Week  

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The physics colloquium organizer is Gavin Davies
This page is maintained by David Sanders
Latest update: Tuesday, 21-Sep-2021 16:52:56 CDT

Past semesters: 

Abstracts of Talks


Jake Bennett, etc.
Department of Physics and Astronomy
University of Mississippi

What can you do with a Physics degree?

Undeclared, interested in exploring other majors, or just curious about the Department of Physics and Astronomy? Want to prepare for professional school or just develop the tools and qualities employers value most? Join us to discover what a degree in Physics can do for you. You will also get the chance to observe some fun and interesting demonstrations.


Martin Frank
Department of Physics
University of South Alabama

First Results from NOνA's Magnetic Monopole Search

The existence of the magnetic monopole has eluded physicists for centuries. The NOνA far detector (FD), used for neutrino oscillation searches, also has the ability to identify slowly moving magnetic monopoles (v < c /100). With a surface area of 4,100 m2 and a location near the earth's surface, the 14 kt FD provides us with the unique opportunity to be sensitive to potential low-mass monopoles unable to penetrate underground experiments. We have designed a novel data-driven triggering scheme that continuously searches the FD's live data for monopole-like patterns. At the offline level, the largest challenge in reconstructing monopoles is to reduce the 148,000 Hz speed-of-light cosmic ray background. In this talk, I will present the first results of the NOνA monopole search for slow monopoles.


Shawn Pollard
Department of Physics and Materials Science
University of Memphis

Designing Chiral Magnetism Through Interface Engineering – From Skyrmions to Magnetic Memory

Chirality is a fundamental concept in condensed matter physics. The ability to control magnetic chirality through broken symmetry at interfaces has led to the development of new devices governed by control of the local spin structure. One such structure, the skyrmion, a result of the Dzyaloshinskii-Moriya interaction (DMI), has been proposed as both a building block of new spintronic devices and as a tool to probe a variety of novel electrical transport phenomena. In this talk, I will describe our efforts to design chiral structures including skyrmions with tunable stability and dynamics by modifying the interface properties in both heavy metal/ferromagnet bi- and multilayers. We find that by tuning the heavy metal and ferromagnetic layer thicknesses and repetition numbers, we can control the skyrmion boundary structure, which has profound effects on its dynamics. This includes the first observation of an interlayer DMI in which a breaking of domain wall degeneracy can be used to prevent off-axial current driven skyrmion motion known as the skyrmion Hall effect. I also discuss our work developing new techniques in which to quantify magnetic phenomena in these materials.


Samrat Choudhury
Department of Mechanical Engineering
University of Mississippi

Machine Learning Enabled Multi-Scale Modeling of Materials

Traditional computational investigation of processing-chemistry-structure-property linkage in materials science involves the usage of specialized computational tools at discrete length scales ranging from electronic to atomic to mesoscale. Alternatively, over the past two decades, a multi-length scale approach combining simulation tools at different length scales has been adopted where electronic/atomic information from lower length scale is passed to higher length scale. However, such traditional computational approaches can provide only limited insights into a highly complex set of interactions spanning over multiple length and time scales each of which are linked to the property and performance of the materials, thus requiring an out-of-the box approach. In this presentation, I will focus on the application of machine learning tools to guide simulations at multiple length scales to augment the capabilities of traditional computational tools. Further, it will be shown that machine learning enabled computational approach provides a fast and efficient pathway to navigate the vast processing, microstructure and chemical search space for a targeted property, a departure from the traditional time consuming and expensive Edisonian trial-and-error approach based on synthesis-testing experimental cycles.