Field-controlled quantum anomalous Hall effect in electron-doped CrSiTe${}_3$ monolayer: a first-principles prediction

Abstract

We report Chern insulating phases emerging from a single layer of layered chalcogenide CrSiTe${}_3$, a transition metal trichacogenides (TMTC) material, in the presence of charge doping. Due to strong hybridization with Te $p$ orbitals, the spin-orbit coupling effect opens a finite band gap, leading to a nontrivial topology of the Cr $e_{\mathrm{g}}$ conduction band manifold with higher Chern numbers. Our calculations show that quantum anomalous Hall effects can be realized by adding one electron in a formula unit cell of Cr${}_2$Si${}_2$Te${}_6$, equivalent to electron doping by 2.36$\times$10${}^{14}$ cm${}^{-2}$ carrier density. Furthermore, the doping-induced anomalous Hall conductivity can be controlled by an external magnetic field via spin-orientation-dependent tuning of the spin-orbit coupling. In addition, we find distinct quantum anomalous Hall phases employing tight-binding model analysis, suggesting that CrSiTe${}_3$ can be a fascinating new platform to realize Chern insulating systems with higher Chern numbers.

9 pages, 8 figures, and additional supplementary information

References in corpus (8)

• Boron nitride substrates for high-quality graphene electronics
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Systematic {\it ab initio} study of the magnetic and electronic properties of all 3d transition metal linear and zigzag nanowires
• Chern insulator at a magnetic rocksalt interface
• Multiple magnetism controlled topological states in EuAgAs
• Optically induced topological states on the surface of mercury telluride
• Tuning ferromagnetic BaFe${}_2$(PO${}_4$)${}_2$ through a high Chern number topological phase
• Quantum spin Hall effect and topological phase transitions in honeycomb antiferromagnets

Cited by in corpus (2)

• Controlling topology through targeted composite symmetry manipulation in magnetic systems
• Probing of magnetic dimensional crossover in CrSiTe${}_3$ through picosecond strain pulses