The Yeh group presents results of recent work exploring topological insulators (TI). In a New Journal of Physics publication, they report direct evidence for magnetism-induced surface-state energy gaps and magnetic impurity resonances in 3D-Topological Insulators by STS studies of bilayer structures of Bi2Se3 and Cr-doped Bi2Se3. Findings include the strong spatial localization and long life-time of these magnetic impurity resonances represent interesting topological bits that are potentially useful for applications to quantum information technology.
In addition to the publication, group members also developed a video abstract describing the work. This video provides an overview of the process and details the findings. Watch the video abstract on the IOP web page.
Read Magnetism-induced massive Dirac spectra and topological defects in the surface state of Cr-doped Bi2Se3-bilayer topological insulators C-C Chen, M L Teague, L He, X Kou, M Lang, W Fan, N Woodward, K-L Wang and N-C Yeh, New Journal of Physics, Volume 17, November 2015. doi:10.1088/1367-2630/17/11/113042