1-D Wires (IMAGE) Penn State Caption One-dimensional wires created in bilayer graphene gated by two pairs of split gates above and below the sheet. Wires traveling in opposite directions carry electrons of different valley states labeled as K and K' in the figure. Credit Zhu, Penn State Usage Restrictions non commercial use only 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.