Jin-Ke Bao

Abstract Superconductivity in a highly correlated kagome system has been theoretically proposed for years (refs. 1,2,3,4,5), yet the experimental realization is hard to achieve6,7. The recently discovered vanadium-based kagome materials8, which exhibit both superconductivity9,10,11 and charge-density-wave orders12,13,14, are nonmagnetic8,9 and weakly correlated15,16. Thus these materials are unlikely to host the exotic superconductivity theoretically proposed.

Abstract We report transport studies on the layered van der Waals topological crystalline insulator Ta2Pd3Te5. The temperature-dependent resistance at high temperature is dominated by a bulk insulating gap and tends to saturate at low temperatures. Low-temperature magnetotransport shows that Ta2Pd3Te5 exhibits weak antilocatization (WAL) effect in both perpendicular orientation and parallel orientation, suggesting a contribution of the WAL effect from both topological edge states and bulk states.

We report a new quasi-one-dimensional compound KMn Bi composed of parallel nanowires crystallizing in a monoclinic space group C2/m with a = 22.994(2) Å, b = 4.6128(3) Å, c = 13.3830(13) Å and β = 124.578(6)°. The nanowires are infinite [Mn Bi ]− columns each of which is composed of a nanotube of Bi atoms acting as the cladding with a nanorod of Mn atoms located in the central axis of the nanotubes.