"It resonates some kind of harmonic and it gets lighter. And if you hit it with enough terahertz, it’ll float."
This is such a great rabbit hole to dig into! This bit at the end of the introduction to topology you linked has me VERY intrigued: “The future of topological materials discovery and applications might not be in the design of new materials, but in...the rediscovery of interesting materials with overlooked properties,” Wieder says. “The next highly desirable solid-state material might be hiding in a 70-year-old paper, if you know where to look.”
Synchronicity. I'm not really an elements guy. And I'm sure I learned of bismuth in high school. However, I recently accidentally stumbled upon "bismuth crystals" on Amazon. It was all new to me. I gave a look of, you've got to be kidding me. What a tell.