Logarithmic singularities and quantum oscillations in magnetically doped topological insulators
arXiv:1711.10675 · doi:10.1103/PhysRevB.97.085151
Abstract
We report magnetotransport measurements on magnetically doped (Bi,Sb)Te films grown by molecular beam epitaxy. In Hallbar devices, logarithmic dependence on temperature and bias voltage are obseved in both the longitudinal and anomalous Hall resistance. The interplay of disorder and electron-electron interactions is found to explain quantitatively the observed logarithmic singularities and is a dominant scattering mechanism in these samples. Submicron scale devices exhibit intriguing quantum oscillations at high magnetic fields with dependence on bias voltage. The observed quantum oscillations can be attributed to bulk and surface transport.
arXiv comment10 pages, 13 figures
References in corpus (28)
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- Quantized Anomalous Hall Effect in Magnetic Topological Insulators
- High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
- Seeing the magnetic monopole through the mirror of topological surface states
- Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
- Topological origin of subgap conductance in insulating bilayer graphene
- Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
- Chiral Topological Superconductor From the Quantum Hall State
- Giant Magneto-optical Kerr Effect and Universal Faraday Effect in Thin-film Topological Insulators
- Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure
- Bulk Fermi surface coexistence with Dirac surface state in BiSe: a comparison of photoemission and Shubnikov-de Haas measurements
- Impurity effect on weak anti-localization in the topological insulator Bi2Te3
- The development of ferromagnetism in the doped topological insulator Bi2-xMnxTe3
- Inverse Spin-Galvanic Effect in a Topological-Insulator/Ferromagnet Interface
- Hedgehog Spin-texture and Berry's Phase tuning in a Magnetic Topological Insulator
- Crossover between weak localization and weak antilocalization in magnetically doped topological insulator
- Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect
- Competition between weak localization and antilocalization in topological surface states
- Evidence for electron-electron interaction in topological insulator thin films
- Electron interaction-driven insulating ground state in Bi2Se3 topological insulators in the two dimensional limit
- Electron-phonon heat transfer in monolayer and bilayer graphene
- High-Field Shubnikov-de Haas Oscillations in the Topological Insulator BiTeSe
- Above 400 K Robust Perpendicular Ferromagnetic Phase in a Topological Insulator
- Zero-field dissipationless chiral edge transport and the nature of dissipation in the quantum anomalous Hall state
- Weak antilocalization in topological insulator BiTe microflakes
- Independent tuning of electronic properties and induced ferromagnetism in topological insulators with heterostructure approach
- Large discrete jumps observed in the transition between Chern states in a ferromagnetic Topological Insulator
- Surface-to-bulk scattering in topological insulator films