Heterodimensional superlattice with in-plane anomalous Hall effect

The Hall effect, development of an electric field transverse to the applied current under a magnetic field, is a key electrical characterization technique and has also led to significant advances in condensed matter physics. Here we report an unexpected Hall effect persisting up to 380 kelvin when the magnetic field is in-plane, a condition under which the Hall effect usually vanishes, in an intrinsic heterodimensional superlattice consisting of alternating layers of two-dimensional vanadium disulfide (VS2) and a one-dimensional vanadium sulfide (VS) chain array. The observation of this effect is supported by theoretical calculations, and can be attributed to an unconventional anomalous Hall effect owing to an out-of-plane Berry curvature induced by an in-plane magnetic field, which is related to the one-dimensional VS chain. Our work pave the way for synthesis of extraordinary superstructures and exploration of novel physical properties.