Second-order topological insulators and tunable topological phase transitions in honeycomb ferromagnets

L Cai, R Li, X Wu, B Huang, Y Dai, C Niu - Physical Review B, 2023 - APS
Intrinsic magnetic topological insulators categorized by bulk-boundary correspondence are
of significant fundamental and technological importance in topotronics. Yet the topological …

Interplay between Haldane and modified Haldane models in lattice: Band structures, phase diagrams, and edge states

KW Lee, PH Fu, YS Ang - Physical Review B, 2024 - APS
We study the topological properties of the Haldane and modified Haldane models in α-T 3
lattice. The band structures and phase diagrams of the system are investigated. Individually …

Engineering gapless edge states from antiferromagnetic Chern homobilayer

X Zou, R Li, Z Chen, Y Dai, B Huang, C Niu - Nano Letters, 2023 - ACS Publications
We put forward that stacked Chern insulators with opposite chiralities offer a strategy to
achieve gapless helical edge states in two dimensions. We employ the square lattice as an …

Progress and challenges for two-dimensional spin-polarized quantum materials

G Zhang, H Wu, W **, L Yang, B ** accounts for their widespread
use in information communication and new energy technologies. It is demonstrated …

Breakdown of helical edge state topologically protected conductance in time-reversal-breaking excitonic insulators

YQ Wang, M Papaj, JE Moore - Physical Review B, 2023 - APS
Gapless helical edge modes are a hallmark of the quantum spin Hall effect. Protected by
time-reversal symmetry, each edge contributes a quantized zero-temperature conductance …

Quantitative theory of backscattering in topological HgTe and (Hg, Mn) Te quantum wells: Acceptor states, Kondo effect, precessional dephasing, and bound magnetic …

T Dietl - Physical Review B, 2023 - APS
We present the theory and numerical evaluations of the backscattering rate determined by
acceptor holes or Mn spins in HgTe and (Hg, Mn) Te quantum wells in the quantum spin Hall …

Tight-binding theory of spin-spin interactions, Curie temperatures, and quantum Hall effects in topological (Hg, Cr) Te in comparison to nontopological (Zn, Cr) Te and …

C Śliwa, T Dietl - Physical Review B, 2024 - APS
Earlier theoretical results on pd and dd exchange interactions for zinc-blende
semiconductors with Cr 2+ and Mn 3+ ions are revisited and extended by including …

Counterpropagating topological and quantum Hall edge channels

S Shamim, P Shekhar, W Beugeling, J Böttcher… - Nature …, 2022 - nature.com
The survival of the quantum spin Hall edge channels in presence of an external magnetic
field has been a subject of experimental and theoretical research. The inversion of Landau …

Theory of glide symmetry protected helical edge states in a monolayer

M Bieniek, JI Väyrynen, G Li, T Neupert, R Thomale - Physical Review B, 2023 - APS
Helical edge states in quantum spin Hall (QSH) materials are central building blocks of
topological matter design and engineering. Despite their principal topological protection …