Direct observation of broken time-reversal symmetry on the surface of a magnetically doped topological insulator

Yoshinori Okada, Chetan Dhital, Wenwen Zhou, Erik D. Huemiller, Hsin Lin, S. Basak, A. Bansil, Y. B. Huang, H. Ding, Z. Wang, Stephen D. Wilson, V. Madhavan

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    111 Citations (Scopus)

    Abstract

    We study interference patterns of a magnetically doped topological insulator Bi2-xFexTe3+d 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.

    Original languageEnglish
    Article number206805
    JournalPhysical Review Letters
    Volume106
    Issue number20
    DOIs
    Publication statusPublished - 2011 May 17

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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  • Cite this

    Okada, Y., Dhital, C., Zhou, W., Huemiller, E. D., Lin, H., Basak, S., Bansil, A., Huang, Y. B., Ding, H., Wang, Z., Wilson, S. D., & Madhavan, V. (2011). Direct observation of broken time-reversal symmetry on the surface of a magnetically doped topological insulator. Physical Review Letters, 106(20), [206805]. https://doi.org/10.1103/PhysRevLett.106.206805