Quantized charge-pumping in higher-order topological insulators

Abstract

We study the quantized charge pumping of higher-order topological insulators (HOTIs) with edge-corner correspondences based on the combination of the rotation of in-plane magnetic field and the quantum spin Hall effect. A picture of a specific charge pumping process is uncovered with the help of the non-equilibrium Green's function method. Significantly, we demonstrate that the quantized charge pumping current is achieved without the participation of bulk states, and the charges move along the boundary of the sample. Furthermore, the effects of external parameters on the pumping current is also studied. We find that the magnitude and direction of the pumping current can be manipulated by adjusting the coupling strength between the leads and sample. Our work deepens the understanding of the charge pumping in HOTIs and extends the study of their transport properties.

arXiv comment8 pages, 5 figures

References in corpus (50)

• Topological Insulators
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Quantized Electric Multipole Insulators
• Higher-Order Topological Insulators
• Electric Multipole Moments, Topological Multipole Moment Pumping, and Chiral Hinge States in Crystalline Insulators
• Observation of a phononic quadrupole topological insulator
• Spin pumping and magnetization dynamics in metallic multilayers
• Higher-order topological insulators and semimetals on the breathing Kagome and pyrochlore lattices
• Demonstration of a quantized microwave quadrupole insulator with topologically protected corner states
• A Thouless Quantum Pump with Ultracold Bosonic Atoms in an Optical Superlattice
• Topological Thouless Pumping of Ultracold Fermions
• Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers
• Second-order photonic topological insulator with corner states
• Floquet scattering theory of quantum pumps
• Higher-order bulk-boundary correspondence for topological crystalline phases
• Majorana corner modes in a high-temperature platform
• Experimental Realization of a Quantum Spin Pump
• High-Temperature Majorana Corner States
• Higher-Order Topological Insulators in Quasicrystals
• Topological charge pumping in a one-dimensional optical lattice
• An Adiabatic Quantum Pump of Spin Polarized Current
• Minimal model for higher-order topological insulators and phosphorene
• Universal Approach to Magnetic Second-Order Topological Insulator
• Second Order Topological Superconductivity in $\pi$-Junction Rashba Layers
• Topological switch between second-order topological insulators and topological crystalline insulators
• Quantized Adiabatic Transport in Momentum Space
• Parametric pumping at finite frequency
• Generating a second-order topological insulator with multiple corner states by periodic driving
• Fractional Topological Superconductivity and Parafermion Corner States
• Floquet Second-Order Topological Superconductor Driven via Ferromagnetic Resonance
• Microwave-driven ferromagnet--topological-insulator heterostructures: The prospect for giant spin battery effect and quantized charge pump devices
• Strong and weak second-order topological insulators with hexagonal symmetry and ${\mathbb{Z}}_3$ index
• Real space topological invariant and higher-order topological Anderson insulator in two-dimensional non-Hermitian systems
• Higher-order topological pumping and its observation in photonic lattices
• High-order topological insulators from high-dimensional Chern insulators
• Quantum Charge Pumps with Topological Phases in Creutz Ladder
• Parametric quantum spin pump
• Disorder-Induced Quantum Phase Transitions in Three-Dimensional Second-Order Topological Insulators
• The Global Phase Diagram of disordered Higher-order Weyl Semimetals
• Topological states and quantized current in helical molecules
• A spin pump turnstile: parametric pumping of a spin-polarized current through a nearly-closed quantum dot
• From fractional boundary charges to quantized Hall conductance
• Bulk-boundary correspondence in disordered higher-order topological insulators
• Spin Chern Pumping from the Bulk of Two-Dimensional Topological Insulators
• Chiral Interface States and Related Quantized Transport in Disordered Chern Insulators
• Robustness of Helical Hinge States of Weak Second-Order Topological Insulators
• Entanglement in a second order topological insulator on a square lattice
• Topological phase transitions of Thouless charge pumping realized in helical organic molecules with long-range hoppings
• Rotoinversion-symmetric bulk-hinge correspondence and its applications to higher-order Weyl semimetals
• Fractional boundary charges with quantized slopes in interacting one- and two-dimensional systems

Cited by in corpus (6)

• Creation and Manipulation of Higher-Order Topological States by Altermagnets
• Cornertronics in Two-Dimensional Second-Order Topological Insulators
• Effects of Disorder On Thouless Pumping In Higher-Order Topological Insulators
• Bulk-boundary-transport correspondence of the second-order topological insulators
• Effects of first- and second-order topological phases on equilibrium crystal shapes
• Fractional spin Josephson effect in topological spin superconductors