Linear and Nonlinear Responses in Magnetic Topological Materials
Open Access
Author:
Mei, Ruobing
Graduate Program:
Physics
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
May 08, 2024
Committee Members:
Zhiwen Liu, Outside Unit & Field Member Chaoxing Liu, Chair & Dissertation Advisor Jorge Sofo, Major Field Member Cuizu Chang, Major Field Member Mauricio Terrones, Program Head/Chair
Keywords:
Magnetic topological insulators quantum anomalous Hall topological superconductivity nonlinear Hall effect
Abstract:
Topological states of matter are exotic quantum phases characterized by global geometric properties that remain robust against local perturbations. Topological insulator (TI) is an example of topological states with time-reversal symmetry. Breaking time-reversal symmetry in topological insulators via magnetism can lead to new topological states including quantum anomalous Hall (QAH) state, axion insulator state, and chiral topological superconductivity (TSC). These magnetic topological systems provide an appealing platform for exploring the interplay between electromagnetism, topology, and magnetic orders. In this dissertation, I will summarize my theoretical works on the linear and nonlinear physical responses in magnetic topological materials.
