AEP Faculty Candidate Seminar - Dr. Georgios Varnavides
Monday, February 19, 2024 11am to 12pm
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Central Campus
Exotic Current Densities and How to (Computationally) Image Them
Dr. Georgios Varnavides
Postdoctoral Research Fellow
University of California, Berkeley
With data centers projected to make up as high as 8% of global demand by 2030, there is a pressing need to design energy-efficient electronic devices using bottom-up techniques. However, two of the most promising platforms for the continued downsizing of transistors in integrated circuits face fundamental physical limitations such as heat dissipation. More broadly, the miniaturization of electronic devices implies the transport of charge, heat, and spin in these devices results in spatially-varying signatures with strong implications in materials properties. For example, recent advances in transport measurements have revealed that electrons in materials can flow collectively, exhibiting fluid phenomena such as channel flow and vortices. Observations of these charged electron fluids re-invigorated the half-century-old field of "electron hydrodynamics" and hold promise in designing energy-efficient electronic devices. In the first part of the talk, I will introduce electron fluids, highlighting their novel anisotropic and non-dissipative viscous contributions enabled by preferred directions in crystalline solids, and discuss the observation of electron fluids in a high-carrier-density conductor for the first time.
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