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Tuesday, March 24, 2020 at 12:20pm
Zoom Meeting
Hosted by James P. Sethna
Geometry, disorder and topology in soft matter: Smectics, Jamming, and Mechanical Metamaterials
Geometry, disorder and topology have a central role in condensed matter. Their interplay and synergy lead to some of the most intriguing phenomena in soft-matter physics. I will show how to use the mathematics of martensites (iron, shape-memory alloys) to study focal conic domains — the most iconic defect of smectic liquid crystals displaying Lorentz invariance and neat arrangements of ellipses and hyperbolas. I will also describe crystalline lattices whose disordered topology is crafted to model the elastic properties of jamming (a ubiquitous transition describing many systems from molecular glasses and granular media to dislocation tangles and biological tissues). Finally, I will design multifunctional metamaterials whose Poisson ratios can be suitably tuned throughout their physical range via random dilution.
Lea Reagan
6072559684
Danilo Liarte
Cornell University LASSP
Public
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