Contact
Mobile
(434) 924-6792
Location
303 JBL
PO Box 400714
Charlottesville, VA 22904

Joseph Poon

William Barton Rogers Professor of Physics
Contact
Mobile
(434) 924-6792
Location
303 JBL
PO Box 400714
Charlottesville, VA 22904
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About

My research group currently focuses on three projects: (i) Experimental and computational study of thermoelectric properties of semiconductors and semimetals. The narrow-bandgap semiconductors studied are often in the proximity of topological semimetals that show unusual thermo-magnetic and electrical transport properties. (ii) Synthesis of thin films and computational study of ferrimagnetic and antiferromagnetic heterostructures that show skyrmionic state and anomalous Hall effect. The unique magnetic spin texture and fast dynamics are ideal for low-power and ultrafast spintronics. (iii) In our third project, we employ data science and experiment to study high-entropy alloys (HEAs) with specific properties in the complex high-dimensional composition space. The enormous flexibility of HEAs offers nearly unlimited possibilities for realizing superior physical and functional properties.

Education

Ph.D., 1978, California Institute of Technology

B.S., 1974, California Institute of Technology

Research Interests

Experimental Condensed Matter Physics

Selected Publications

Tunable Magnetic Skyrmions in Ferrimagnetic Mn4N. Chung T. Ma, Timothy Q. Hartnett, Wei Zhou, Prasanna v. Balachandran, and S. Joseph Poon, Appl. Phys. Lett. 119, 192406 (2021).
Skyrmionics - Computing and Memory Technologies Based on Topological Excitations in Magnets. Hamed Vakili, Wei Zhou, Chung T. Ma, S. J. Poon, M. G. Morshed, Mohammad Nazmus Sakib, Samiran Ganguly, Mircea Stan, Timothy Q. Hartnett, Prasanna Balachandran, Jun-Wen XU, Yassine Quessab, Andrew D. Kent, Kai Litzius, Geoffrey S. D. Beach, and Avik W.GH.
Harnessing the High-Dimensional Compositional Space of High-Entropy Alloys. S. J. Poon, J. Qi, and A. M. Cheung, Book Chapter in “High-Entropy Materials: Theory, Experiments, and Applications”, Isbn-978-3-030-77640-4 (Springer Nature, 2021), P. 63-113.
Spark Plasma Synthesis of SiGe Materials and Performance of Unicouples. Jonathan Pierce, Richard Ung, Mei Himmtann, Joseph Poon, and Rama Venkatasubramanian, Nuclear and Emerging Technologies for Space, Ornl, April 26-30, 2021.
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