Momentum-Resolved Landau-Level Spectroscopy of Dirac Surface State in Bi2Se3

Abstract

We investigate Dirac fermions on the surface of the topological insulator Bi2Se3 using scanning tunneling spectroscopy. Landau levels (LLs) are observed in the tunneling spectra in a magnetic field. In contrast to LLs of conventional electrons, a field independent LL appears at the Dirac point, which is a hallmark of Dirac fermions. A scaling analysis of LLs based on the Bohr-Sommerfeld quantization condition allowed us to determine the dispersion of the surface band. Near the Fermi energy, fine peaks mixed with LLs appear in the spectra, which may be responsible for the anomalous magneto-fingerprint effect [J. G. Checkelsky et al., Phys. Rev. Lett. 103, 246601 (2009)].

4 pages, 4 figures

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• One-dimensional Topological Edge States of Bismuth Bilayers
• Surface State Transport and Ambipolar Electric Field Effect in Bi2Se3 Nanodevices
• Electronic properties of graphene: a perspective from scanning tunneling microscopy and magneto-transport
• Epitaxial growth of topological insulator Bi2Se3 film on Si(111) with atomically sharp interface
• A quantum phase transition from triangular to stripe charge order in NbSe${}_2$
• Quantum interference and Aharonov-Bohm oscillations in topological insulators
• Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators
• Surface magnetic ordering in topological insulators with bulk magnetic dopants
• Influence of Topological Edge States on the Properties of Al/Bi2Se3/Al Hybrid Josephson Devices
• Imaging two-component nature of Dirac-Landau levels in the topological surface state of Bi2Se3
• Stationary phase approximation approach to the quasiparticle interference on the surface of a strong topological insulator
• Restoring Pristine Bi2Se3 Surface with an Effective Se Decapping Process
• Scanning Tunneling Microscopy of Gate Tunable Topological Insulator Bi2Se3 Thin Films
• Dirac cone shift of a passivated topological Bi2Se3 interface state
• Probing Dirac Fermion Dynamics in Topological Insulator Bi${}_2$Se${}_3$ Films with Scanning Tunneling Microscope
• Crystal growth and electronic properties of a 3D Rashba material, BiTeI, with adjusted carrier concentrations
• Thin films of a three-dimensional topological insulator in a strong magnetic field: a microscopic study
• Spin-Polarized Quantum Well States on Bi${}_{2-x}$Fe${}_x$Se${}_3$
• Self-consistent $\text{k}\cdot \text{p}$ calculations for gated thin layers of 3D Topological Insulators
• Strong magneto-optical effects due to surface states in three-dimensional topological insulators
• Ultrafast electron dynamics at the Dirac node of the topological insulator Sb${}_2$Te${}_3$