Influences of the dissipative topological edge state on quantized transport in MnBi2Te4

Abstract

The beauty of quantum Hall (QH) effect is the metrological precision of Hall resistance quantization that originates from the topological edge states. Understanding the factors that lead to quantization breakdown not only provides important insights on the nature of the topological protection of these edge states, but is beneficial for device applications involving such quantized transport. In this work, we combine conventional transport and real space conductivity mapping to investigate whether the quantization breakdown is tied to the disappearance of edge state in the hotly studied MnBi2Te4 system. Our experimental results unambiguously show that topological edge state does exist when quantization breakdown occurs. Such edge state is dissipative in nature and could lead to a quantization breakdown due to its diffusive character causing overlapping with bulk and other edge states in real devices. Our findings bring attentions to issues that are generally inaccessible in the transport study of QH, but can play important roles in practical measurements and device applications.

References in corpus (31)

• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBi${}_2$Te${}_4$
• Prediction and observation of the first antiferromagnetic topological insulator
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
• Topological axion states in magnetic insulator MnBi${}_2$Te${}_4$ with the quantized magnetoelectric effect
• Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
• Quantum Anomalous Hall Effect in Hg${}_{1-y}$Mn${}_y$Te Quantum Wells
• Experimental realization of an intrinsic magnetic 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
• High-Chern-Number and High-Temperature Quantum Hall Effect without Landau Levels
• Gapless surface Dirac cone in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Layer Hall effect in a 2D topological Axion antiferromagnet
• Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4
• Dirac surface states in intrinsic magnetic topological insulators EuSn2As2 and MnBi2nTe3n+1
• Imaging Dirac-Mass Disorder from Magnetic Dopant-Atoms in the Ferromagnetic Topological Insulator Cr${}_x$(Bi${}_{0.1}$Sb${}_{0.9}$)${}_{2-x}$Te${}_3$
• Metal-to-Insulator Switching in Quantum Anomalous Hall States
• Visualization of superparamagnetic dynamics in magnetic topological insulators
• Zero-field dissipationless chiral edge transport and the nature of dissipation in the quantum anomalous Hall state
• Universal Scaling of Quantum Anomalous Hall Plateau Transition
• Anomalous Edge Transport in the Quantum Anomalous Hall State
• Quantum anomalous Hall edge channels survive up to the Curie temperature
• Experimental evidence on the dissipationless transport of chiral edge state of the high-field Chern insulator in MnBi2Te4 nanodevices
• Bulk dissipation in the quantum anomalous Hall effect
• Quantum Hall transport as a probe of capacitance profile at graphene edges
• Demonstration of Dissipative Quasihelical Edge Transport in Quantum Anomalous Hall Insulators
• Spin fluctuations in quantized transport of magnetic topological insulators
• Absence of signatures of Weyl orbits in the thickness dependence of quantum transport in cadmium arsenide

Cited by in corpus (9)

• Colloquium: Quantum anomalous Hall effect
• Dissipationless Layertronics in Axion Insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• On the half-quantized Hall conductance of massive surface electrons in magnetic topological insulator films
• Implementing Microwave Impedance Microscopy in a Dilution Refrigerator
• Non-Hermitian superconducting diode effect
• Quantum interference in a superconductor-${\mathrm{MnBi}}_2{\mathrm{Te}}_4$-superconductor Josephson junction
• Dissipation Enhanced Unidirectional Transport in Topological Systems
• Chiral edge state coupling theory of transport in quantum anomalous Hall insulators
• Direct visualization of edge state in even-layer MnBi2Te4 at zero magnetic field