Item

ITEM ACTIONS

This item is discarded!DetailsSummary

Discarded

Journal Article

A high-temperature quantum anomalous Hall effect in electride gadolinium monohalides

MPS-Authors

/persons/resource/persons264666

Chen, Chen
International Center for Quantum and Molecular Structures, Materials Genome Institute, Physics Department, Shanghai University;
Shanghai Key Laboratory of High Temperature Superconductors and State Key Laboratory of Advanced Special Steel, Shanghai University;
NOMAD, Fritz Haber Institute, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Chen, C., Fang, L., Zhao, G., Liu, X., Wang, J., Burton, L. A., et al. (2021). A high-temperature quantum anomalous Hall effect in electride gadolinium monohalides. Journal of Materials Chemistry C, 9(30), 9539-9544. doi:10.1039/D1TC01513C.

Abstract

Electrides, with interstitial electrons loosely trapped in lattice voids behaving as anions, are favorable for achieving band inversions required for topological phases. In this paper, we predict that the quantum anomalous Hall effect (QAHE) with either in-plane or out-of-plane magnetization can be realized in gadolinium monohalides GdX (X = F, Cl, Br, and I), a new class of two-dimensional electrides. The spin polarization of interstitial electrons contributes to the ferromagnetism and stabilizes the crystal structure. Our calculations demonstrate that monolayer GdX are intrinsic QAHE insulators with in-plane magnetization and have band gaps up to 48.6 meV. Furthermore, we show that an external magnetic field can be used to realize the QAHE with out-of-plane magnetization, such as in monolayer GdI with the largest band gap of 84.3 meV among all halides considered in this work. The estimated Curie temperatures of GdX are about 510–650 K, which is above room temperature. Our studies reveal that the GdX electrides provide an attractive platform for exploring tunable, large-gap QAHE and open up opportunities to design new high-temperature quantum devices.