Figure 1 (IMAGE) Peking University Caption Figure 1. ZEBSs at the ends of a long atomic line defect (about 15 Te/Se atoms in length). a, An STM topographic image of the long 1D atomic line defect. b, Spatial zero-energy mapping. c, Tunnelling spectra measured at the lower end and in the middle of the atomic line defect. d, Tunnelling spectra taken along the red arrow direction in a. e, The temperature evolution of the ZEBS at the bottom end of the line defect. The coloured curves are normalized tunnelling spectra and the grey curves are the 4.2-K spectra convoluted by the Fermi-Dirac distribution function at higher temperatures. f, The tunnelling barrier dependence of the ZEBS at the bottom end of the line defect. Credit School of Physics, Peking 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.