Landau level spectroscopy of relativistic fermions with low Fermi velocity in Bi2Te3 three-dimensional topological insulator

Abstract

X-band microwave spectroscopy is applied to study the cyclotron resonance in Bi2Te3 exposed to ambient conditions. With its help, intraband transitions between Landau levels of relativistic fermions are observed. The Fermi velocity equals to 3260 m/s, which is much lower than has been reported in the literature for samples cleaved in vacuum. Simultaneous observation of bulk Shubnikov - de Haas oscillations by contactless microwave spectroscopy allows determination of the Fermi level position. Occupation of topological surface states depends not only on bulk Fermi level but also on the surface band bending.

References in corpus (12)

• Topological Insulators
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
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• STM imaging of electronic waves on the surface of Bi${}_2$Te${}_3$: topologically protected surface states and hexagonal warping effects
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• Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
• Thickness-dependent bulk properties and weak anti-localization effect in topological insulator Bi2Se3
• Collective modes of the massless Dirac plasma
• Persistence of Topological Order and Formation of Quantum Well States in Topological Insulators Bi2(Se,Te)3 under Ambient Conditions

Cited by in corpus (15)

• Observation of quasi-two-dimensional Dirac fermions in ZrTe5
• Singular robust room-temperature spin response from topological Dirac fermions
• Band bending inversion in Bi${}_2$Se${}_3$ nanostructures
• Bulk and surface spin conductivity in topological insulators with hexagonal warping
• Majorana fermions at the edge of superconducting islands
• Landau level spectroscopy of Bi${}_2$Te${}_3$
• Landau theory of helical Fermi liquids
• Theory of electron spin resonance in bulk topological insulators Bi2Se3, Bi2Te3 and Sb2Te3
• Nematic superconductivity in topological insulators induced by hexagonal warping
• Bulk cyclotron resonance in the topological insulator Bi2Te3
• Fermi level dependence of magnetism and magnetotransport in the magnetic topological insulators Bi${}_2$Te${}_3$ and BiSbTe${}_3$ containing self-organized MnBi${}_2$Te${}_4$ septuple layers
• Dynamical Gap Generation in Topological Insulators
• Bulk spin conductivity of three-dimensional topological insulator
• Strong photon coupling to high-frequency antiferromagnetic magnons via topological surface states
• Relativistic corrections to Landau levels in the presence of a parallel linear electric field