Final Report: Near-Field Microwave Probing of Nontrivial Topological Boundary States

Abstract

The goal of this project is to locally probe the nanoscale conductivity distribution of quantum spin Hall and quantum anomalous Hall systems, with special focus on their topological edge channels, by near-field microwave impedance microscopy (MIM). The boundaries of these exotic quantum states can support dissipationless electrical transport and may serve as perfectly conducting channels in radio-frequency nanoelectronic and spintronic devices. While both effects have been successfully demonstrated by macroscopic measurements, much remains to be explored on the microscopic details of the edge states. Local probing of theseexotic quantum states by the low-temperature MIM is there not only of great academic interest but also of technological importance to realize high-speed and low-power electronics for defense applications.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2023
Accession Number
AD1226279

Entities

People

  • Keji Lai

Organizations

  • University of Texas at Austin

Tags

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing