SNAPSHOT: This Element's Weird Behavior Could Lead to Faster Electronics

(Credit: Ali Yazdani Laboratory, Princeton University) You’ve never seen bismuth like this before. Element 83 on the periodic table, bismuth is a hard, pinkish-white metal that can grow in stunning geometric crystals. Recently, researchers have been taking a closer look at bismuth, down to the atomic level. Shown here is a simulation of orbiting bismuth surface electrons in a very strong magnetic field. Note how the electrons are all gathered in clumps inside each potential orbit. Scientists refer to this as an energy valley. The Princeton-led study, published in Nature Physics this month, used a technique called scanning tunneling microscopy to show that bismuth electrons prefer to crowd into a single valley, creating a type of electricity called ferroelectricity. Scientists call it "emergent behavior." We’re reaching the physical limits of packing transistors into increasingly tiny spaces, but insights into this growing field of “valleytronics” could lead to new materials that ...