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

  title={Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2},
  author={Noam Morali and Rajib Batabyal and Pranab K. Nag and Enke Liu and Qiunan Xu and Yan Sun and Binghai Yan and Claudia Felser and Nurit Avraham and Haim Beidenkopf},
  pages={1286 - 1291}
Magnetic Weyl semimetals Weyl semimetals (WSMs)—materials that host exotic quasiparticles called Weyl fermions—must break either spatial inversion or time-reversal symmetry. A number of WSMs that break inversion symmetry have been identified, but showing unambiguously that a material is a time-reversal-breaking WSM is tricky. Three groups now provide spectroscopic evidence for this latter state in magnetic materials (see the Perspective by da Silva Neto). Belopolski et al. probed the material… 

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

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

Localized spin-orbit polaron in magnetic Weyl semimetal Co3Sn2S2

The kagome lattice Co3Sn2S2 exhibits the quintessential topological phenomena of a magnetic Weyl semimetal such as the chiral anomaly and Fermi-arc surface states. Probing its magnetic properties is

Observation of linearly dispersive edge modes in a magnetic Weyl semimetal Co3Sn2S2

The physical realization of Chern insulators is of fundamental and practical interest, as they are predicted to host the quantum anomalous Hall effect (QAHE) and topologically protected chiral edge

Evidence for one-dimensional chiral edge states in a magnetic Weyl semimetal Co3Sn2S2

Using modeling and numerical simulations, it is found that depending on the strength of the interlayer coupling, chiral edge states can be localized on partially exposed kagome planes on the surfaces of a Weyl semimetal.

Critical thickness for the emergence of Weyl features in Co3Sn2S2 thin films

Magnetic Weyl semimetals are quantum phases of matter arising from the interplay of linearly dispersive bands, spin-orbit coupling, and time reversal symmetry breaking. This can be realised, for

Evolution of Weyl nodes in Ni-doped thallium niobate pyrochlore Tl2−xNixNb2O7

The magnetic Weyl semimetal (WSM) is important for fundamental physics and potential applications due to its spontaneous magnetism, robust band topology, and enhanced Berry curvature. It possesses

Magnetic and Electronic Properties of Weyl Semimetal Co2MnGa Thin Films

This work presents the structural, magnetic and electronic properties of magnetron co-sputtered Co2MnGa thin films, with thicknesses ranging from 10 to 80 nm, and indicates a relation between the thickness-dependent structural and magnetic properties.

Observation of 1D Fermi arc states in Weyl semimetal TaAs

Abstract Fermi arcs on Weyl semimetals exhibit many exotic quantum phenomena. Usually found on atomically flat surfaces with approximate translation symmetry, Fermi arcs are rooted in the peculiar

Andreev reflection in Fermi-arc surface states of Weyl semimetals

Fermi arc surface states are the hallmark of Weyl semimetals, whose identification is usually challenged by their coexistence with gapless bulk states. Surface transport measurements by fabricating

Weak antilocalization and ferromagnetism in magnetic Weyl semimetal Co3Sn2S2

Here, we report the synthesis of single crystalline magnetic Weyl semimetal Co3Sn2S2. The synthesized crystal is characterized through various tools, viz. x-ray diffraction, field emission electron



Topological surface Fermi arcs in the magnetic Weyl semimetal Co3Sn2S2

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

Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP

Very recently the topological Weyl semimetal (WSM) state was predicted in the noncentrosymmetric compounds NbP, NbAs, TaP, and TaAs and soon led to photoemission and transport experiments to verify

Direct observation of nonequivalent Fermi-arc states of opposite surfaces in the noncentrosymmetric Weyl semimetal NbP

Weyl semimetals (WSMs) provide a platform to realize long-sought massless Weyl fermions, which can host a variety of exotic quantum phenomena such as chiral anomalies and anomalous Hall conductivity.

Erratum: Weyl semimetal phase in the non-centrosymmetric compound TaAs

Experiments show that TaAs is a three-dimensional topological Weyl semimetal. Three-dimensional (3D) topologicalWeyl semimetals (TWSs) represent a state of quantum matter with unusual electronic

Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal

The measurements reveal 10 different scattering wave vectors, which can be understood and precisely reproduced with a theory that takes into account the shape, spin texture, and momentum-dependent propagation of the Fermi arc surface states into the bulk.

Mirror Protected Dirac Fermions on a Weyl Semimetal NbP Surface.

Through scanning tunneling spectroscopy, it is found that NbP's (001) surface hosts a pair of Dirac cones protected by mirror symmetry, and the quantum interference patterns arising from these novel Dirac fermions are resolved and revealed.

Discovery of a Weyl fermion semimetal and topological Fermi arcs

The experimental discovery of a Weyl semimetal, tantalum arsenide (TaAs), using photoemission spectroscopy, which finds that Fermi arcs terminate on the Weyl fermion nodes, consistent with their topological character.

Giant anomalous Hall angle in a half-metallic magnetic Weyl semimetal

Magnetic Weyl semimetals (WSMs) with time reversal symmetry breaking exhibit Weyl nodes that act as monopoles of Berry curvature and are thus expected to generate a large intrinsic anomalous Hall

Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates

We investigate novel phases that emerge from the interplay of electron correlations and strong spin-orbit interactions. We focus on describing the topological semimetal, a three-dimensional phase of

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo2Sn

Electronic structure calculations suggest that the half-metallic nature of unsubstituted ZrCo2Sn is disrupted significantly by the Cu substitutions, leading to the breakdown of the magnetization vs. electron count guidelines usually followed by Heusler phases, and a more typical metallic non-spin-polarized electronic structure at high x.