van der Waals BSCCO Device (IMAGE) DOE/Argonne National Laboratory Caption Graphic showing van der Waals BSCCO device. (a) Optical image of Hall bar device, (b) Cross-sectional view of a typical device in scanning TEM. Columns of atoms are visible as dark spots; black arrows point to bismuth oxide layers (darkest spots), while gray arrows show their extrapolated positions. (c) Resistivity as a function of temperature for devices of a different thickness. Credit Argonne National Laboratory 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.