Seonglae ChoSlow-moving quasiparticles make the fastest semiconductor in the world
The quasiparticle of this semiconductor moves slowly, steadily and unimpeded from other electrons, allowing it to travel faster than those in silicon.
https://interestingengineering.com/science/fastest-most-efficient-semiconductor
Exciton-polariton
In physics the Exciton–polariton is a type of polariton; a hybrid light and matter quasiparticle arising from the strong coupling of the electromagnetic dipolar oscillations of excitons (either in bulk or quantum wells) and photons.[1] Because light excitations are observed classically as photons, which are massless particles, they do not therefore have mass, like a physical particle. This property makes them a quasiparticle.
https://en.wikipedia.org/wiki/Exciton-polariton
A superatomic semiconductor sets a speed record
<p>The search is on for better semiconductors. Writing in <a href="https://doi.org/10.1126/science.adf2698" target="_blank"><em>Science</em></a>, a team of chemists at Columbia University led by Jack Tulyag, a PhD student working with chemistry professor <a href="https://www.delor-labs.com/" target="_blank">Milan Delor,</a> describes the fastest and most efficient semiconductor yet: a superatomic material called Re<sub>6</sub>Se<sub>8</sub>Cl<sub>2</sub>. </p>
https://www.eurekalert.org/news-releases/1005426
