Experimental Setup (IMAGE) Joint Quantum Institute Caption This is a schematic of the device, which is submerged in an ionic liquid. A positive electrode (not shown) draws away the negative ions in this liquid, leaving the positively-charged ions (plus signs) to induce a dense layer of electrons in the (lavender-shaded) strontium titanate layer beneath. Credit Stanford University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.