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


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 (US)
Article number166407
JournalPhysical review letters
Issue number16
StatePublished - Oct 18 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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