Magnetization direction-controlled topological band structure in TlTiX (X = Si, Ge) monolayers DOI

Keer Huang,

Lei Li, Wu Zhao

et al.

Journal of Physics Condensed Matter, Journal Year: 2024, Volume and Issue: 36(22), P. 225702 - 225702

Published: Feb. 21, 2024

The quantum anomalous Hall (QAH) insulator is a vital material for the investigation of emerging topological effects, but its extremely low working temperature limits experiments. Apart from challenge, effective regulation state QAH insulators another crucial concern. Here, by first-principles calculations, we find family stable two-dimensional materials TlTiX (X = Si, Ge) are large-gap insulators. Their robust ferromagnetic (FM) ground states determined both direct- and super-exchange FM coupling. In absence spin-orbit coupling (SOC), there exist spin-polarized crossing point located at each

Language: Английский

Weyl nodal loop semimetals and tunable quantum anomalous Hall states in two-dimensional ferromagnetic cerium monohalides DOI
Shu-Zong Li,

Jun‐Shan Si,

Zhixiong Yang

et al.

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 109(11)

Published: March 13, 2024

Quantum anomalous Hall (QAH) effect with dissipationless edge channels offers innovative insight for designing the next-generation low-power electronic devices. Based on first-principles calculations and tight-binding (TB) model, we predict rich QAH states a tunable Chern number in single-layer ferromagnetic cerium monohalides $\mathrm{Ce}X$ ($X$ = Cl, Br, I). These stable materials have isotropic magnetocrystalline anisotropy $x\text{\ensuremath{-}}y$ plane, which favors adjustment of topological state an external magnetic field. A distinct Weyl nodal loop exists band structure single layers without spin-orbit coupling (SOC). When SOC is included all mirror symmetries are broken, can be realized. Intriguingly, varying ($C=\ifmmode\pm\else\textpm\fi{}1$), two-dimensional semimetals gap periodically manifest as magnetization direction rotates plane. Furthermore, TB model based Slater-Koster framework constructed to explain origin nontrivial layers. The exhibit remarkable states, providing excellent platform exploring spintronic

Language: Английский

Citations

8
Magnetization direction-controlled topological band structure in TlTiX (X = Si, Ge) monolayers DOI

Keer Huang,

Lei Li, Wu Zhao

et al.

Journal of Physics Condensed Matter, Journal Year: 2024, Volume and Issue: 36(22), P. 225702 - 225702

Published: Feb. 21, 2024

The quantum anomalous Hall (QAH) insulator is a vital material for the investigation of emerging topological effects, but its extremely low working temperature limits experiments. Apart from challenge, effective regulation state QAH insulators another crucial concern. Here, by first-principles calculations, we find family stable two-dimensional materials TlTiX (X = Si, Ge) are large-gap insulators. Their robust ferromagnetic (FM) ground states determined both direct- and super-exchange FM coupling. In absence spin-orbit coupling (SOC), there exist spin-polarized crossing point located at each

Language: Английский

Citations

0