# Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2

@article{Xu2018TopologicalSF, title={Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2}, author={Qiunan Xu and Enke Liu and Wujun Shi and Lukas Muechler and Jacob Gayles and Claudia Felser and Yan Sun}, journal={Physical Review B}, year={2018} }

Very recently, the half-metallic compound Co3Sn2S2 was proposed to be a magnetic Weyl semimetal (WSM) with Weyl points only 60 meV above the Fermi level E-F. Owing to the low charge carrier density and large Berry curvature induced, Co3Sn2S2 possesses both a large anomalous Hall conductivity and a large anomalous Hall angle, which provide strong evidence for the existence of Weyl points in Co3Sn2S2. In this work, we theoretically study the surface topological feature of Co3Sn2S2 and its…

## 104 Citations

Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal
Co3Sn2S2

- PhysicsPhysical Review B
- 2019

Weyl semimetals with time reversal symmetry breaking are expected to show various fascinating physical behaviors, such as intrinsic giant anomalous Hall effect, chiral anomaly effect in the bulks,…

Investigation of point-contact Andreev reflection on magnetic Weyl semimetal Co3Sn2S2

- Physics
- 2020

Magnetic Weyl semimetals (WSMs) with broken time-reversal symmetry (TRS) hosting topological band structures are expected to provide an ideal platform for investigating topological superconductivity…

Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2

- Physics, MedicineScience
- 2019

By investigating three distinct surface terminations of the ferromagnetic semimetal Co3Sn2S2, it is verified spectroscopically that the distinct surface potentials imposed by three different terminations modify the Fermi-arc contour and Weyl node connectivity.

Giant magneto-optical responses in magnetic Weyl semimetal Co3Sn2S2

- Physics, MedicineNature communications
- 2020

The terahertz Faraday and infrared Kerr rotations are found to be remarkably enhanced by these resonances with topological electronic structures, demonstrating the novel low-energy optical response inherent to the magnetic WSM.

Giant anomalous Hall effect in a ferromagnetic Kagomé-lattice semimetal

- Physics, Materials ScienceNature physics
- 2018

Electrical transport measurements reveal that Co3Sn2S2 is probably a magnetic Weyl semimetal, and hosts the highest simultaneous anomalous Hall conductivity and anomalies angle, driven by the strong Berry curvature near the Weyl points.

Breakdown of Ohm's law and nontrivial Berry phase in magnetic Weyl semimetal Co3Sn2S2.

- Medicine, PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2020

The investigation of magneto-transport measurements in single crystals of magnetic Weyl semimetal Co3Sn2S2 shows a turn-on like behaviour followed by saturation in resistivity under magnetic field in the low temperature region which allocates to the topological surface states, and evidence for time reversal symmetry breaking is provided.

On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2

- Materials Science, PhysicsApplied Physics Letters
- 2019

Co3Sn2S2, a quasi-two-dimensional system with a kagome lattice, has been found to be a magnetic Weyl semimetal recently. In this work, the anisotropies of magnetization and transport properties of…

Theoretical study of topological materials

- 2018

We have theoretically studied topological materials ranging from topological insulators to semimetals from the perspective of topological band theory. In insulators, we predicted a strong 3D Z2…

Two-dimensionality of metallic surface conduction in Co3Sn2S2 thin films

- Physics
- 2021

Two-dimensional (2D) surface of the topological materials is an attractive channel for the electrical conduction reflecting the linearly-dispersive electronic bands. Thickness-dependent sheet…

Electronic correlations and flattened band in magnetic Weyl semimetal Co3Sn2S2

- Physics
- 2019

The interplay between electronic correlations and topological protection may offer a rich avenue for discovering emergent quantum phenomena in condensed matter. However, electronic correlations have…

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