The paradigmatic example of a topological phase of matter, the two-dimensional Chern insulator,,,–, is characterized by a topological invariant consisting of a single integer, the …
Disorder in Weyl semimetals and superconductors is surprisingly subtle, attracting attention and competing theories in recent years. In this brief review, we discuss the current …
CA Li, B Fu, ZA Hu, J Li, SQ Shen - Physical Review Letters, 2020 - APS
We investigate disorder-driven topological phase transitions in quantized electric quadrupole insulators in two dimensions. We show that chiral symmetry can protect the …
The physical realization of Chern insulators is of fundamental and practical interest, as they are predicted to host the quantum anomalous Hall (QAH) effect and topologically protected …
T Ohtsuki, T Ohtsuki - Journal of the Physical Society of Japan, 2016 - journals.jps.jp
Random electron systems show rich phases such as Anderson insulator, diffusive metal, quantum Hall and quantum anomalous Hall insulators, Weyl semimetal, as well as …
We numerically study the effect of short-ranged potential disorder on massless noninteracting three-dimensional Dirac and Weyl fermions, with a focus on the question of …
We study the stability of three-dimensional incompressible Weyl semimetals in the presence of random quenched charge impurities. Combining numerical analysis and scaling theory …
T Ohtsuki, T Ohtsuki - Journal of the Physical Society of Japan, 2017 - journals.jps.jp
Three-dimensional random electron systems undergo quantum phase transitions and show rich phase diagrams. Examples of the phases are the band gap insulator, Anderson …
Abstract Time Reversal Symmetry (TRS) broken topological phases provide gapless surface states protected by topology, regardless of additional internal symmetries, spin or valley …