Visualizing landau levels of dirac electrons in a one-dimensional potential

Yoshinori Okada, Wenwen Zhou, Chetan Dhital, D. Walkup, Ying Ran, Z. Wang, Stephen D. Wilson, V. Madhavan

    Research output: Contribution to journalArticlepeer-review

    26 Citations (Scopus)

    Abstract

    Using scanning tunneling spectroscopy, we study a 3D topological insulator Bi 2Te 3 with a periodic structural deformation (buckling). The buckled surface allows us to measure the response of Dirac electrons in a magnetic field to the presence of a well-defined potential variation. We find that while the n=0 Landau level exhibits a 12 meV energy shift across the buckled structure at 7 T, the amplitude of this shift changes with the Landau level index. Modeling these effects reveals that the Landau level behavior encodes information on the spatial extent of their wave functions. Our findings have important implications for transport and magnetoresistance measurements in Dirac materials with engineered potential landscapes.

    Original languageEnglish
    Article number166407
    JournalPhysical review letters
    Volume109
    Issue number16
    DOIs
    Publication statusPublished - 2012 Oct 18

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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