Fully Spin-Polarized Nodal Loop Semimetals in Alkaline Metal Monochalcogenide Monolayers

Zhou X, Zhang RW, Zhang Z, Ma DS, Feng W, Molcrousov Y, Yao Y (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of Physical Chemistry Letters American Chemical Society

Book Volume: 10

Pages Range: 3101-3108

Journal Issue: 11

DOI: 10.1021/acs.jpclett.9b00906

Abstract

Topological semimetals in ferromagnetic materials have attracted an enormous amount of attention due to potential applications in spintronics. Using first-principles density functional theory together with an effective lattice model, here we present a new family of topological semimetals with a fully spin-polarized nodal loop in alkaline metal monochalcogenide MX (M = Li, Na, K, Rb, or Cs; X = S, Se, or Te) monolayers. The half-metallic ferromagnetism can be established in MX monolayers, in which one nodal loop formed by two crossing bands with the same spin components is found at the Fermi energy. This nodal loop half-metal survives even when considering the spin-orbit coupling owing to the symmetry protection provided by the Mz mirror plane. The quantum anomalous Hall state and Weyl-like semimetal in this system can be also achieved by rotating the spin from the out-of-plane to the in-plane direction. The MX monolayers hosting rich topological phases thus offer an excellent platform for realizing advanced spintronic concepts.

Involved external institutions

Beijing Institute of Technology (BIT) / 北京理工大学 CN China (CN) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Zhou, X., Zhang, R.-W., Zhang, Z., Ma, D.-S., Feng, W., Molcrousov, Y., & Yao, Y. (2019). Fully Spin-Polarized Nodal Loop Semimetals in Alkaline Metal Monochalcogenide Monolayers. Journal of Physical Chemistry Letters, 10(11), 3101-3108. https://doi.org/10.1021/acs.jpclett.9b00906

MLA:

Zhou, Xiaodong, et al. "Fully Spin-Polarized Nodal Loop Semimetals in Alkaline Metal Monochalcogenide Monolayers." Journal of Physical Chemistry Letters 10.11 (2019): 3101-3108.

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