Observation of the quantum-anomalous-Hall insulator to Anderson insulator quantum phase transition and its scaling behavior

Abstract

Fundamental insight into the nature of the quantum phase transition from a superconductor to an insulator in two dimensions, or from one plateau to the next or to an insulator in quantum Hall effect, has been revealed through the study of its scaling behavior. Here, we report on the experimental observation of a quantum phase transition from a quantum-anomalous-Hall (QAH) insulator to an Anderson insulator in a magnetic topological insulator by tuning the chemical potential. Our experiment demonstrates the existence of scaling behavior from which we extract the critical exponent for this quantum phase transition. We expect that our work will motivate much further investigation of many properties of quantum phase transition in this new context.

17 pages, 4 figures. Accepted by PRL. Comments are welcome

References in corpus (8)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
• Trajectory of Anomalous Hall Effect toward the Quantized State in a Ferromagnetic Topological Insulator
• Scale-Invariant Dissipationless Chiral Transport in Magnetic Topological Insulators beyond the Two-Dimensional Limit
• Topological Anderson Insulator
• Giant Anisotropic Magnetoresistance in a Quantum Anomalous Hall Insulator
• Quantum criticality at the Chern-to-normal insulator transition

Cited by in corpus (30)

• Observation of Fractionally Quantized Anomalous Hall Effect
• Colloquium: Quantum anomalous Hall effect
• Deep Learning the Quantum Phase Transitions in Random Two-Dimensional Electron Systems
• Deep Learning the Quantum Phase Transitions in Random Electron Systems: Applications to Three Dimensions
• Confinement-Induced Chiral Edge Channel Interaction in Quantum Anomalous Hall Insulators
• Critical Behavior and Universal Signature of an Axion Insulator State
• Progress and prospects in the quantum anomalous Hall effect
• Zero Magnetic Field Plateau Phase Transition in Higher Chern Number Quantum Anomalous Hall Insulators
• Bulk dissipation in the quantum anomalous Hall effect
• Electrical Switching of the Edge Current Chirality in Quantum Anomalous Hall Insulators
• Distinct quantum anomalous Hall ground states induced by magnetic disorders
• Quantum-Hall to Insulator Transition in Ultra-low-carrier-density Topological Insulator Films and a Hidden Phase of the Zeroth Landau Level
• Evolution of quantum entanglement with disorder in fractional quantum Hall liquids
• Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator
• Weak quantization of non-interacting topological Anderson insulator
• Phase transitions in intrinsic magnetic topological insulator with high-frequency pumping
• Three-Dimensional Quantum Anomalous Hall Effect in Magnetic Topological Insulator Trilayers of Hundred-Nanometer Thickness
• Chiral edge state coupling theory of transport in quantum anomalous Hall insulators
• From classical to quantum regime of topological surface states via defect engineering
• Engineering Plateau Phase Transition in Quantum Anomalous Hall Multilayers
• Environmental Doping-Induced Degradation of the Quantum Anomalous Hall Insulators
• Quantum Hall criticality in an amorphous Chern insulator
• Non-Abelian operation through scattering between chiral Dirac edge modes
• Proposal for realizing anomalous Floquet insulators via Chern band annihilation
• Correlated disorder induced anomalous transport in magnetically doped topological insulators
• Cyclic cocycles and quantized pairings in materials science
• Interlayer Exchange Coupling-Induced Critical-Metal-to-Insulator Phase Transition in Quantum Anomalous Hall Insulators
• Designing Magnetic Topological Insulator Trilayers for Highly-Efficient Spin-Orbit Torque Switching
• Robust quantum anomalous Hall effect with spatially uncorrelated disorder
• To See a World in a Grain of Sand -- The Scientific Life of Shoucheng Zhang