Pressure-induced superconducting behavior was found in two anion radical salts, EtMe3Z[Pd(dmit)2]2 (dmit = 1,3-dithiole-2-thione-4,5-dithiolate, Z = P, As), that are Mott insulators and exhibit different magnetic and structural transitions at ambient pressure.

Rapid progress of quantum transport study in topological Dirac semimetal, including observations of quantum Hall effect in two-dimensional (2D) Cd 3 As 2 samples, has uncovered even more interesting quantum transport properties in high-quality and three-dimensional (3D) samples. However, such 3D Cd 3 As 2 films with low carrier density and high electron mobility have been hardly obtained. Here we report the growth and characterization of 3D thick Cd 3 As 2 films adopting molecular beam epitaxy. The highest electron mobility (µ = 3 × 10 4 cm 2 /Vs) among the reported film samples has been achieved at a low carrier density (n = 5 × 10 16 cm −3 ). In the magnetotransport measurement, Hall plateau-like structures are commonly observed in spite of the 3D thick films (t = 120 nm). On the other hand, field angle dependence of the plateau-like structures and corresponding Shubunikov-de Haas oscillations rather shows a 3D feature, suggesting the appearance of unconventional magnetic orbit, also distinct from the one described by the semiclassical Weyl-orbit equation.

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