chiral interface state (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Scanning tunneling microscopy images show a chiral interface state wavefunction (bright stripe) in a QAH insulator made from twisted monolayer-bilayer graphene in a 2D device. The interface can be moved across the sample by modulating the voltage on a gate electrode placed underneath the graphene layers. Credit Canxun Zhang/Berkeley Lab Usage Restrictions Credit Canxun Zhang/Berkeley Lab License Original 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.