Anisotropic and strong negative magneto-resistance in the three-dimensional topological insulator Bi2Se3

Abstract

We report on high-field angle-dependent magneto-transport measurements on epitaxial thin films of Bi2Se3, a three-dimensional topological insulator. At low temperature, we observe quantum oscillations that demonstrate the simultaneous presence of bulk and surface carriers. The magneto- resistance of Bi2Se3 is found to be highly anisotropic. In the presence of a parallel electric and magnetic field, we observe a strong negative longitudinal magneto-resistance that has been consid- ered as a smoking-gun for the presence of chiral fermions in a certain class of semi-metals due to the so-called axial anomaly. Its observation in a three-dimensional topological insulator implies that the axial anomaly may be in fact a far more generic phenomenon than originally thought.

6 pages, 4 figures

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Cited by in corpus (17)

• Quantum Transport in Topological Semimetals under Magnetic Fields
• Weyl fermions with arbitrary monopole in magnetic fields: Landau levels, longitudinal magnetotransport, and density-wave ordering
• Observation of Planar Hall Effect in Topological Insulator -- Bi${}_2$Te${}_3$
• Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt3Sn topological semimetal
• Spin-dependent scattering induced negative magnetoresistance in topological insulator Bi2Te3 nanowires
• Coexistence of bulk and surface states probed by Shubnikov-de Haas oscillations in Bi${}_2$Se${}_3$ with high charge-carrier density
• Hexagonal Warping Induced Nonlinear Planar Nernst Effect in Nonmagnetic Topological Insulators
• Semiclassical magnetotransport including the effects of the Berry curvature and Lorentz force
• Nonlinear planar magnetotransport due to tilted Dirac cones in topological materials
• Quantum oscillations of the nonlinear planar effects signifying chiral anomaly in Weyl Semimetals
• Magnetotransport due to conductivity fluctuations in non-magnetic ZrTe2 nanoplates
• Accessing topological surface states and negative MR in sculpted nanowires of Bi2Te3 at ultra-low temperature
• Unidirectional magneto-transport of linearly dispersing topological edge states
• Magnetoresistance in the Extreme Quantum Limit: Field-Induced Crossover to the Unitarity Limit
• Linear magnetoresistance of two-dimensional massless Dirac fermions in the quantum limit
• Non-Ohmic negative longitudinal magnetoresistance in two-dimensional electron gas
• Theory for the negative longitudinal magnetoresistance in the quantum limit of Kramers Weyl semimetals