Abstract
We study interference patterns of a magnetically doped topological insulator by using Fourier transform scanning tunneling spectroscopy and observe several new scattering channels. A comparison with angle-resolved photoemission spectroscopy allows us to unambiguously ascertain the momentum-space origin of distinct dispersing channels along high-symmetry directions and identify those originating from time-reversal symmetry breaking. Our analysis also reveals that the surface state survives far above the energy where angle-resolved photoemission spectroscopy finds the onset of continuum bulk bands.
- Received 20 January 2011
DOI:https://doi.org/10.1103/PhysRevLett.106.206805
© 2011 American Physical Society