Spin-Split Band Hybridization in Graphene Proximitized with α-RuCl Nanosheets.

Proximity effects induced in the two-dimensional Dirac material graphene potentially open access to novel and intriguing physical phenomena. Thus far, the coupling between graphene and ferromagnetic insulators has been experimentally established. However, only very little is known about graphene's interaction with antiferromagnetic insulators.

Electrical Transport Signature of the Magnetic Fluctuation-Structure Relation in α-RuCl Nanoflakes.

The small gap semiconductor α-RuCl has emerged as a promising candidate for quantum spin liquid materials. Thus far, Raman spectroscopy, neutron scattering, and magnetization measurements have provided valuable hints for collective spin behavior in α-RuCl bulk crystals. However, the goal of implementing α-RuCl into spintronic devices would strongly benefit from the possibility of electrically probing these phenomena.

Efficient Photothermoelectric Conversion in Lateral Topological Insulator Heterojunctions.

Tuning the electron and phonon transport properties of thermoelectric materials by nanostructuring has enabled improving their thermopower figure of merit. Three-dimensional topological insulators, including many bismuth chalcogenides, attract increasing attention for this purpose, as their topologically protected surface states are promising to further enhance the thermoelectric performance. While individual bismuth chalcogenide nanostructures have been studied with respect to their photothermoelectric properties, nanostructured p-n junctions of these compounds have not yet been explored.

Surface oxidation effect on the electrical behaviour of Bi2Te2Se nanoplatelets.

Charge transport in topological insulators is notably influenced by moisture and air in the surrounding environment. At present, however, little is known about the detailed composition of the oxidized surface and its impact on the electrical characteristics of these materials. Here, we investigate the surface oxide formation on the topological insulator Bi2Te2Se (BTS) and how this affects its electrical behavior.