Hard Magnetic Topological Semimetals in XPt3: Harmony of Berry Curvature
arXiv:2008.11914 · doi:10.1038/s42005-021-00608-1
Abstract
Topological magnetic semimetals, like Co3Sn2S2 and Co2MnGa, are known to display exotic transport properties, such as large intrinsic anomalous (AHE) due to uncompensated Berry curvature. The highly symmetric XPt3 compounds display anti-crossing gapped nodal lines, which are a driving mechanism in the intrinsic Berry curvature Hall effects. Uniquely, these compounds contain two sets of gapped nodal lines that harmoniously dominate the Berry curvature in this complex multiband system. We calculate a maximum AHE of 1965 S/cm in the CrPt3 by a state-of-the-art first principle electronic structure. We have grown high-quality thin films by magnetron sputtering and measured a robust AHE of 1750 S/cm for different sputtering growth conditions. Additionally, the cubic films display a hard magnetic axis along [111] direction. The facile and scalable fabrication of these materials is prime candidates for integration into topological devices.
References in corpus (22)
- Berry Phase Effects on Electronic Properties
- Anomalous Hall effect
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Topological Materials: Weyl Semimetals
- Dirac semimetal in three dimensions
- Topological nodal semimetals
- Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
- Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
- Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
- Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
- Anomalous Hall Effect in Weyl Metals
- Heusler, Weyl, and Berry
- Topological surface Fermi arcs in the magnetic Weyl semimetal CoSnS
- Anomalous Hall effect of ferromagnetic Fe3Sn2 single crystal with geometrically frustrated kagome lattice
- Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet
- Large anomalous Nernst effect in thin films of the Weyl semimetal Co2MnGa
- Room-Temperature Terahertz Anomalous Hall Effect in Weyl Antiferromagnet MnSn Thin Films
- Noisy pulses enhance temporal resolution in pump-probe spectroscopy
- Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal CoMnGa
- Emerging chiral edge states from the confinement of a magnetic Weyl semimetal in CoSnS
- Strong anomalous Nernst effect in collinear magnetic Weyl semimetals without net magnetic moments
- Linear Response in Topological Materials