George Yumnam
Experimental condensed matter physicist / Materials physicist
Quantum and Unconventional Magnets, High Entropy Alloys, Geometric frustration
Neutron and X-ray Scattering, Low temperature Electrical and Magnetic properties Characterization.
Physical & Chemical Vapor Deposition, Ultra high vacuum techniques, Bridgman synthesis
Quantum disorder, frustrated magnetism, and emergent excitations
I am a experimental condensed matter physicist/materials scientist working on correlated electron systems, frustrated magnetism, and their excitations.
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​I am currently a Postdoctoral Researcher at Oak Ridge National Laboratory (since December 2022), where I employ a variety of neutron and x-ray scattering techniques, Mossbauer Spectroscopy to study magnetic structures & dynamics in systems that exhibit hybrid excitations, such as spin-lattice coupling, aiming to establish design principles for functional materials.
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I received my Ph.D. in Physics from the University of Missouri–Columbia in December 2022, where I explored quantum magnetism in artificial honeycomb lattices. This work led to the discovery of a quantum disordered state in artificial honeycomb lattices and the elucidation of its elusive magnetic diode behaviors.
Education
2017-2022
Ph.D. (Physics)
University of Missouri-Columbia
Thesis: Magnetic Charge Correlation and Quantum Disorder in Honeycomb Spin Ice Systems
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UHV Electron beam assisted Physical Vapor Deposition,
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Low temperature electrical and magnetic properties
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Surface characterization: AFM, SEM, Neutron Reflectometry
2016-2017
M.Sc. (Materials Science)
Indian Institute of Science, Bangalore
Thesis: Unravelling the Role of Ionicity in Thermal Transport of van der Waals Materials
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Density functional theory, Boltzmann transport theory
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Machine learning and high throughput computation
2012-2016
B.Sc. (Materials Science)
Indian Institute of Science, Bangalore
Thesis: Identifying efficient thermoelectric materials via first principle high throughput screening
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Density functional theory, Boltzmann transport theory
CONTACT ME
1 Bethel Valley Rd,
Oak Ridge National Laboratory, MS: 6064
Oak Ridge, Tennessee
USA - 37830
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