Two-dimensionality of metallic surface conduction in Co3Sn2S2 thin films

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 conductance measurement is a reliable method to evaluate the 2D and three-dimensional (3D) electrical conducting channel separately but has rarely been applied for Weyl semimetals. By applying this method to thin films of a Weyl semimetal Co3Sn2S2, here we show that the 2D conducting channel clearly emerges under the ferromagnetic phase, indicating a formation of the Fermi arcs projected from Weyl nodes. Comparison between 3D conductivity and 2D conductance provides the effective thickness of the surface conducting region being estimated to be approximately 20 nm, which would reflect the Weyl feature of electronic bands of the Co3Sn2S2. The emergent surface conduction will provide a pathway to activate quantum and spintronic transport features stemming from a Weyl node in thin-film-based devices.

Dynamics of proton, ion, molecule, and crystal lattice in functional molecular assemblies

Dynamic molecular processes, such as short- or long-range proton (H+) and ion (M+) motions, and molecular rotations in electrical conducting and magnetic molecular assembly enable to fabricate the electron –...

Impacts of heterogenous-homogeneous reactions in the flow of Prandtl nanofluids with convective heating process

This research article discusses the 3-D flow of magnetized Prandtl nanoliquid by convectively heated surface utilizing homogeneous-heterogeneous reactions. An extendable surface produces the flow. Thermophoresis and random development are investigated. Thermal transport for the convective method is accounted. The Prandtl material is an electrical conducting via applying a magnetic field. Appropriate non-dimensional factors correspond to the non-linear differential equations. Acquired non-linear differential frameworks are comprehended via the optimal homotopic procedure. Physical amounts like surface drag force and rate of the heat transfer are investigated through sketches. It is seen that the impacts of Biot and Hartman numbers on the concentration and the temperature are very comparative. Both the concentration and the temperature are improved for growing estimations of Biot and Hartman numbers.