Imagine trying to fill up a glass of water, and the more you pour in, the emptier the glass gets. It sounds far-fetched, but if you try this same experiment with electrons instead of water, it’s actually quite possible.
For scientists, the counter-intuitive behavior of electrons prompted an important question: Is there a level in a sea of electrons, and can one measure it?
The answer is yes, according to a team of researchers in the Cockrell School of Engineering at The University of Texas at Austin. Led by graduate student Kayoung Lee and associate professor Emanuel Tutuc, both in the Department of Electrical and Computer Engineering, the researchers developed a novel device structure that can measure the level of electrons in graphene bilayers. Discovered in 2004, graphene is a super strong, single-atom-thick carbon material, with properties that make it a promising material for